Recent questions tagged q15

Find the distance of the line $4x + 7y + 5 = 0$ from the point (1, 2) along the line $2x-y=0$

asked May 21, 2014 by thanvigandhi_1

1 answer

In a class of 20 students,every student had a hand shake with every other student.The total no of hand shakes were

asked May 19, 2014 by sreemathi.v

1 answer

If $nC_{r-1}=36,nC_r=84$ and $nC_{r+1}=126$ then find $rC_2$

asked May 15, 2014 by sreemathi.v

1 answer

The perpendicular from the origin to the line $y=mx+c$ meets it at the point (-1,2). Find the values of $m$ and $c$.

asked May 13, 2014 by thanvigandhi_1

1 answer

Prove the following statement by the principle of mathematical induction : \[\] $1+2+2^2+...+2^n=2^{n+1}-1$ for all natural numbers $n$.

asked May 5, 2014 by thanvigandhi_1

0 answers

Find the equation of normal to the curve $x^2+2y=8x-2 $ at the point $(6,5)$

asked May 1, 2014 by meena.p

0 answers

Prove the following by using the principle of mathematical induction for all $n \in N$ \[\] $ 1^2+3^2+5^2+...+(2n-1)^2=\large\frac{n(2n-1)(2n+1)}{3}$

asked Apr 30, 2014 by thanvigandhi_1

1 answer

Prove : $\cot 4x(\sin 5x+\sin 3x)=\cot x(\sin 5x-\sin 3x)$

asked Apr 17, 2014 by sreemathi.v

1 answer

Find the derivative of the following functions ( it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers ) $ cosec \: x \cot x$

asked Apr 14, 2014 by thanvigandhi_1

1 answer

If $ y = 500e^{\large 7x} + 600e^{\large -7x}$, what is $\large\frac{d^2y}{dx^2}$

asked Apr 10, 2014 by balaji.thirumalai

1 answer

Find the equations of the hyperbola satisfying the given conditions: Foci: $(0,\pm \sqrt {10})$ and passing through $(2,3)$.

asked Apr 8, 2014 by balaji.thirumalai

1 answer

In the circuit shown here, the point $C$ is kept connected to point $A$ till the current flowing through the circuit becomes constant. Afterward, suddenly, point $C$ is disconnected from point $A$ and connected to point $B$ at time $t = 0.$ Ratio of the voltage across resistance and the inductor at $t = \large\frac{L}{R}$ will be equal to

asked Apr 7, 2014 by meena.p

1 answer

Evaluate the following limits $ \lim\limits_{ x \to \pi} \large\frac{ \sin ( \pi - x)}{ \pi ( \pi - x)}$

asked Apr 3, 2014 by thanvigandhi_1

1 answer

Find the equation of an ellipse that satisfies the following conditions: Length of major axis is $26$ and Foci is $(\pm5,0)$

asked Apr 3, 2014 by balaji.thirumalai

1 answer

Does the point $(-2.5,3.5)$ lie inside, outside or on the circle $x^2+y^2=25$?

asked Apr 1, 2014 by balaji.thirumalai

1 answer

If $p^{th},\:q^{th}\:\:and\:\:r^{th}$ terms oa an A.P. are $a,\:b\:and\:c$ respectively, then show that $(q-r)a+(r-p)b+(p-q)c=0$

asked Mar 31, 2014 by rvidyagovindarajan_1

1 answer

Glucose and Fructose are

asked Mar 27, 2014 by thanvigandhi_1

1 answer

Which of the following will not give primary amine?

asked Mar 21, 2014 by thanvigandhi_1

1 answer

Iron is rendxred passive by treatment with concentrated

asked Mar 17, 2014 by meena.p

1 answer

The absolute entropy of a free element

asked Mar 15, 2014 by thanvigandhi_1

1 answer

In which one of the following pairs,molecules/ions have similar shape?

asked Mar 10, 2014 by sreemathi.v

1 answer

Natural rubber is a polymer of

asked Mar 6, 2014 by thanvigandhi_1

1 answer

A positive carbylamine test is given by

asked Feb 28, 2014 by sreemathi.v

1 answer

Given a G.P. with $a=729$ and $7^{th}$ term is $64$. Find $S_7.$

asked Feb 27, 2014 by rvidyagovindarajan_1

1 answer

If $ V_x , V_m\: and\: V_r$ respectively are the speed of X-rays, microwaves and radio waves in air, then

asked Feb 25, 2014 by thanvigandhi_1

1 answer

If $\large\frac{a^n+b^n}{a^{n-1}+b^{n-1}}$ is the $A.M.$ between $a$ and $b$, then find the value of $n$

asked Feb 24, 2014 by rvidyagovindarajan_1

1 answer

Isomers which are mirror images are known as __

asked Feb 21, 2014 by meena.p

1 answer

In the below reaction the product Y is

asked Feb 19, 2014 by sreemathi.v

1 answer

According to Graham's law , at a given temperature , the ratio of rates of diffusion $\large\frac{r_A}{r_B}$ of gases A and B is given by:

asked Feb 13, 2014 by sharmaaparna1

1 answer

Find whether the point $A(1,2),B(3,6)$&$C(5,10)$ are collinear or not?

asked Feb 4, 2014 by sreemathi.v

1 answer

General solution of differential equation : $ (1-x^2)(1-y)dx -xy (1+y) dy=0$

asked Feb 3, 2014 by meena.p

1 answer

The metal present in chlorophyll

asked Jan 31, 2014 by sreemathi.v

1 answer

The conduction band of a solid is partially filled at OK.Then the solid is

asked Jan 27, 2014 by meena.p

1 answer

In the manufacture of caustic soda by castner keliner process.The products formed are

asked Jan 27, 2014 by sreemathi.v

1 answer

Consider the statement $ \log \bigg(\large\frac{5c}{a} \bigg),\: \log \bigg(\large\frac{3b}{5c} \bigg)$ and $ \log \bigg(\large\frac{a}{3b} \bigg)$ are in AP, where a,b,c are in GP. The statement is true only if a,b,c are the lengths of sides of

asked Jan 23, 2014 by thanvigandhi_1

1 answer

The metal that can't displace hydrogen from dil HCl is

asked Jan 22, 2014 by sreemathi.v

1 answer

In which statement is the OR exclusive?

asked Jan 20, 2014 by thanvigandhi_1

1 answer

Among the following which is contaminant

asked Jan 20, 2014 by sreemathi.v

1 answer

What is the negation of the statement: Jaipur is a city?

asked Jan 17, 2014 by thanvigandhi_1

1 answer

If X is a Poisson variate such that $ P(2)=9\: P(4)+90\: P(6)$. then mean of X is

asked Jan 15, 2014 by thanvigandhi_1

1 answer

The ratio between the neutrons present in carbon and silicon with respect to mass number of 12 and 28 respectively is

asked Jan 10, 2014 by sreemathi.v

1 answer

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