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Recent questions tagged kvquestionbank2012
Questions
Find the interval in which the function $f(x)=x^4-4x^3+4x^2+15$ is increasing or decreasing.
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q67
p20
math
asked
Jan 29, 2013
by
meena.p
0
answers
Show that $ f(x)=3x^5+40x^3+240x$ is always increasing on R.
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q66
p20
math
asked
Jan 29, 2013
by
meena.p
0
answers
Show that the function $f(x)=e^{2x}$ is strictly increasing on R.
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q65
p20
math
asked
Jan 29, 2013
by
meena.p
0
answers
Water is passed into an inverted cone of base radius 5 cm and depth 10 cm at the rate of $\Large\frac{3}{2}$ c.c/sec. Find the rate at which the level of water is rising when depth is 4 cm.
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q64
p20
math
asked
Jan 29, 2013
by
meena.p
0
answers
Gas is escaping from a spherical balloon at the rate of $900 cm^3$/sec. How fast is the surface area, radius of the balloon shrinking when the radius of the balloon is 30cm?
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q63
p20
math
asked
Jan 29, 2013
by
meena.p
0
answers
The surface area of a spherical bubble is increasing at the rate of $ 2 cm^2$/sec. Find the rate at which the volume of the bubble is increasing at the instant if its radius is 6 cm.
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q62
p20
math
asked
Jan 29, 2013
by
meena.p
0
answers
The volume of a spherical balloon is increasing at the rate of $25\; cm^3$/sec. Find the rate of change of its surface area at the instant when the radius is 5 cm.
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q61
p20
math
asked
Jan 29, 2013
by
meena.p
0
answers
A balloon which always remains spherical is being inflated by pumping in gas at the rate of $900\; cm^3$/sec. Find the rate at which the radius of the balloon is increasing when the radius of the balloon is 15 cm
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q60
p20
math
asked
Jan 29, 2013
by
meena.p
0
answers
An edge of a variable cube is increasing at the rate of 5 cm/sec. How fast is the volume of the cube is increasing when edge is 10cm long?
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q59
p20
math
asked
Jan 29, 2013
by
meena.p
0
answers
A man 160 cm tall walks away from a source of light situated at the top of the pole 6m high at the rate of 1.1 m/sec. How fast is the length of the shadow increasing when he is 1m away from the pole.
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q58
p20
math
asked
Jan 29, 2013
by
meena.p
0
answers
Sand is pouring from a pipe at the rate of 12cm3/sec. The falling sand forms a cone on the ground in such a way that the height of the cone is always one-sixth of the radius of the base. How fast is the height of the sand cone in increasing when the height is 4 cm?
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q57
p20
math
asked
Jan 29, 2013
by
meena.p
0
answers
A point on the hypotenuse of a right angled triangle is at distances a and b from the sides. Show that the length of the hypotenuse is at least $ \bigg(a^{2/3}+b^{2/3}\bigg)^{3/2}$
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q56
p19
math
asked
Jan 29, 2013
by
meena.p
0
answers
Show that the height of the cone of maximum volume that can be inscribed in a sphere of radius 12 cm is 16 cm.
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q55
p19
math
asked
Jan 29, 2013
by
meena.p
0
answers
Find the maximum slope of the curve $ f(x)=2x+3x^2-x^3-27$
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q54
p19
math
asked
Jan 29, 2013
by
meena.p
0
answers
Given the sum of the perimeters of a square and a circle show that the sum of their areas is least when the side of the square is equal to the diameter of a circle.
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q53
p19
math
asked
Jan 29, 2013
by
meena.p
0
answers
Show that the semi vertical angle of the cone of maximum volume and of given slant height is $ \tan ^{-1} \sqrt 2$
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q52
p19
math
asked
Jan 29, 2013
by
meena.p
0
answers
Prove that the volume of the largest cone that can be inscribed in a sphere of radius R is $\Large\frac{8}{27}$ of the volume of the sphere.
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q51
p19
math
asked
Jan 29, 2013
by
meena.p
0
answers
Show that the rectangle of maximum area that can be inscribed in a circle of radius 'r' cms is a square of side $\sqrt 2 r$
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q50
p19
math
asked
Jan 29, 2013
by
meena.p
0
answers
Of all the rectangles each of which has perimeter 40 metres find one which has maximum area.Find the area also.
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q49
p19
math
asked
Jan 29, 2013
by
meena.p
0
answers
Show that the height of the right circular cylinder of maximum volume that can be inscribed in a given right circular cone of height $h\; is\; h/3$
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q48
p19
math
asked
Jan 29, 2013
by
meena.p
0
answers
Show that the volume of the greatest cylinder which can be inscribed in a cone of height h and semi vertical angle $ 30^\circ\;is\;\large\frac{4}{81}\pi h^3$
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q47
p19
math
asked
Jan 29, 2013
by
meena.p
0
answers
A rectangular window is surmounted by an equilateral triangle. Given that the perimeter is 16 cm. Find the width of the window so that the maximum amount of light may enter.
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q46
p19
math
asked
Jan 29, 2013
by
meena.p
0
answers
Find the area of the greatest isoscles triangle that can be inscribed in a given ellipse $ \Large\frac{x^2}{a^2}+\frac{y^2}{b^2}$=1 with its vertex coinciding with one extremity of the major axis.
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q45
p19
math
asked
Jan 29, 2013
by
meena.p
0
answers
A window is in the form of a rectangle above which there is a semicircle. If the perimeter of the window is P cm. Show that the window will allow the maximum possible light only when the radius of the semi circle is $\large\frac{p}{\pi+4}cm$
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q44
p19
math
asked
Jan 29, 2013
by
meena.p
0
answers
Show that the volume of greatest cylinder which can be inscribed in a cone of height h and semi vertical angle $\alpha\;is\;\frac{4}{27}\pi h^3\tan ^2\alpha$
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q43
p19
math
asked
Jan 29, 2013
by
meena.p
0
answers
Find the absolute maximum and absolute minimum value of $ f(x)=2 \cos x+x \qquad x\in[0,\pi]$
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q42
p19
math
asked
Jan 29, 2013
by
meena.p
0
answers
Show that the height of a cylinder of maximum volume that can be inscribed in a sphere of radius R is $ \Large\frac{2R}{\sqrt 3}$
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q41
p19
math
asked
Jan 29, 2013
by
meena.p
0
answers
Show that the right circular cone of least curved surface area and given volume is $\sqrt 2 $ times the radius of the base.
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q40
p19
math
asked
Jan 29, 2013
by
meena.p
0
answers
Show that the semi vertical angle of a right circular cone of given total surface area and maximum volume is $\sin^{-1} \frac{1}{3}$
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q39
p18
math
asked
Jan 29, 2013
by
meena.p
0
answers
Show that the semi vertical angle of a right circular cone of maximum volume and given slant height is $\tan^{-1}\sqrt 2$
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q38
p18
math
asked
Jan 29, 2013
by
meena.p
0
answers
Find the points on the curve $ y=x^3-3x^2+2x$ at which the tangent to the curve is parallel to the line $ y-2x+3=0$
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q37
p18
math
asked
Jan 29, 2013
by
meena.p
0
answers
Prove that the curves $ y^2=4ax\;and\;xy=c^2$ cut at right angles if $ c^4=32a^4$
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q36
p18
math
asked
Jan 29, 2013
by
meena.p
0
answers
Find the equation of all lines having slope -1 and that are tangents to the curve $ y=\Large\frac{1}{x-1}, \normalsize x\neq1$
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q35
p18
math
asked
Jan 29, 2013
by
meena.p
0
answers
Find the point on the curve $ y=x^3-11x+5 $ at which the tangent has equation $y=x-11$
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q34
p18
math
asked
Jan 29, 2013
by
meena.p
0
answers
Find the equation of tangent to the curve $\sqrt x+\sqrt y=\sqrt a $ at the point $(x_1,y_1)$ and show that the sum of its intercepts on the axes is constant.
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q33
p18
math
asked
Jan 29, 2013
by
meena.p
0
answers
Find the interval in which the function f(x) is increasing or decreasing $ f(x)=x^3-12 x^2+36x+17 $
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q32
p18
math
asked
Jan 29, 2013
by
meena.p
0
answers
A cone is circumscribed about a sphere of radius r. Show that the volume of the cone is maximum when its semi vertical angle is $\sin^{-1}\bigg(\Large\frac{1}{3}\bigg)$
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q31
p18
math
asked
Jan 29, 2013
by
meena.p
0
answers
What angle is formed by the y-axis and the tangent to the parabola $ y=x^2+4x-17$ at the point $ p(5/2,-3/4)?$
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q30
p18
math
asked
Jan 29, 2013
by
meena.p
0
answers
If $ P_1\;and\; P_2 $are the lengths of the perpendiculars from origin on the tangent and normal to the curve $ x^{2/3}+y^{2/3}=a^{2/3} $respectively Prove that $ 4P_1^2+P_2^2=a^2$
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q29
p18
math
asked
Jan 29, 2013
by
meena.p
0
answers
Find the equation of normal to the curve $ y=(1+x)^y+\sin^{-1}(\sin^2x)$ at x=0
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q28
p18
math
asked
Jan 29, 2013
by
meena.p
0
answers
Find the interval in which the following functions are increasing or decreasing\[(a)\;y=log \bigg(x+\sqrt{1+x^2}\bigg)\qquad(b)\;y=\frac{10}{4x^3-9x^2+6x}\]
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q27
p18
math
asked
Jan 29, 2013
by
meena.p
0
answers
Determine the points of maxima and minima of the function $ f(x)= \frac{1}{8}log x-bx+cx^2\; where\; b \geq 0$
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q26
p18
math
asked
Jan 29, 2013
by
meena.p
0
answers
The least value of $ f(x)=\tan -1(\sin x+cos x)$ strictly increasing is \[(a)\;\bigg(\frac{\pi}{4},\frac{\pi}{2}\bigg)\qquad(b)\;\bigg(0,\frac{\pi}{2}\bigg)\qquad(c)\;0\qquad(d)\;none\; of\; these.\]
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q25
p18
math
asked
Jan 29, 2013
by
meena.p
0
answers
The least value of 'a' such that the function $ f(x)=x^2+ax+1 $ is strictly increasing on (1,2) is \[(a)\;-2\qquad(b)\;2\qquad(c)\;\frac{1}{2}\qquad(d)\;-\frac{1}{2}\]
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q24
p17
math
asked
Jan 29, 2013
by
meena.p
0
answers
The function $ f(x)=-\Large\frac{x}{2}\normalsize+ \sin x $ is always increasing in \[(a)\;\bigg(-\frac{\pi}{2},\frac{\pi}{2}\bigg)\qquad(b)\;\bigg(0,\frac{\pi}{4}\bigg)\qquad(c)\;\bigg(\frac{\pi}{4},\frac{\pi}{2}\bigg)\qquad(d)\;\bigg(-\frac{\pi}{3},\frac{\pi}{3}\bigg)\qquad\]
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q23
p17
math
asked
Jan 29, 2013
by
meena.p
0
answers
If the slope of the tangent is zero at $ (x_1,y_1)$then the equation of the tangent at $(x_1,y_1)$ is \[y_1=mx_1+c \qquad(b)\;y_1=mx_1\qquad(c)\;y-y_1\qquad(d)\;y=0\]
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q22
p17
math
asked
Jan 29, 2013
by
meena.p
0
answers
If $ \Large\frac{dy}{dx} \normalsize =0$ then the tangent is \[(a)\;Parallel to x-axis\qquad(b)\;parallel to y-axis\qquad(c)\;Perpendicular to x-axis\qquad\]\[(d)\;perpendicular to y-axis\]
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q21
p17
math
asked
Jan 29, 2013
by
meena.p
0
answers
The tangents to the curve $ y=x^3+6 $ at the points (-1,5) and (1,7) are \[(a)\;Perpendicular\qquad(b)\;parallel\qquad(c)\;coincident\qquad(d)\;none\; of\; these\]
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q20
p17
math
asked
Jan 29, 2013
by
meena.p
0
answers
The values of a and b for which the function$f(x)= \left\{ \begin{array}{1 1} ax+1 & \quad x\leq3 \\ bx+3 & \quad x>3 \end{array} \right. $ is continuous at x=3 are \[(a)\;3a+2b=5 \qquad(b)\;3a=2+3b\qquad(c)\;3,2\qquad(d)\;none\;of\;these.\]
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q19
p17
math
asked
Jan 29, 2013
by
meena.p
0
answers
'C' on LMV for $f(x)=x^2-3x$ in [0,1] is \[(a)\;0 \qquad(b)\;\frac{1}{2}\qquad(c)\;-\frac{1}{2}\qquad(d)\;does\;not\;exist\]
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q18
p17
math
asked
Jan 29, 2013
by
meena.p
0
answers
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