Recent questions tagged ch9

If $a\bigg(\large\frac{1}{b}+\frac{1}{c}\bigg)$$,\:b\bigg(\large\frac{1}{c}+\frac{1}{a}\bigg)$$,\:c\bigg(\large\frac{1}{a}+\frac{1}{b}\bigg)$ are in A.P., then prove that $a,b,c$ are in A.P.

asked Mar 31, 2014 by rvidyagovindarajan_1

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

Let $S$ be the sum, $P$ the product and $R$ the sum of reciprocals of $n$ terms of a G.P. Prove that $P^2R^n=S^n$

asked Mar 31, 2014 by rvidyagovindarajan_1

1 answer

If $\large\frac{a+bx}{a-bx}=\frac{b+cx}{b-cx}=\frac{c+dx}{c-dx}$$\:(x\neq0)$, then show that $a,b,c\:and\:d$ are in G.P.

asked Mar 30, 2014 by rvidyagovindarajan_1

1 answer

The sum of first four terms of an A.P. is $56$. The sum of last four terms is $112$. If its first term is $11$ then find the number of terms.

asked Mar 30, 2014 by rvidyagovindarajan_1

1 answer

A G.P. consists of even number of terms. If the sum of all the numbers is $5$ times the sum of terms occupying the odd places, then find the common ratio.

asked Mar 30, 2014 by rvidyagovindarajan_1

1 answer

The sum of three numbers in G.P. is $56$. If we subtract $1,7,21$ from the numbers in that order, we obtain an A.P. Find the numbers.

asked Mar 30, 2014 by rvidyagovindarajan_1

1 answer

The first term of a G.P. is $1$. The sum of third term and fifth term is $90$. Find the common ratio of the G.P.

asked Mar 30, 2014 by rvidyagovindarajan_1

1 answer

The sum of some terms of a G.P. is $315$ whose first term and the common ratio are $5$ and $2$ respectively. Find the last term and number of terms of the series.

asked Mar 30, 2014 by rvidyagovindarajan_1

1 answer

If $f$ is a function satisfying $f(x+y)=f(x).f(y)\:\:\forall x,y\in N$ such that $f(1)=3\:\:and\:\:\displaystyle\sum ^{n}_{x=1} f(x)=120$, then find the value of $n$.

asked Mar 29, 2014 by rvidyagovindarajan_1

1 answer

Find the sum of all two digit numbers which when divided by $4$ yields $1$ as remainder.

asked Mar 29, 2014 by rvidyagovindarajan_1

1 answer

Find the sum of all the integers from $1$ and $100$ that are divisible by $2$ or $5$.

asked Mar 29, 2014 by rvidyagovindarajan_1

1 answer

Find the sum of all the numbers between $200$ and $400$ which are divisible by $7$.

asked Mar 28, 2014 by rvidyagovindarajan_1

1 answer

If the sum of $n,2n\:and\:3n$ terms of an A.P. are $S_1,S_2\:and\:S_3$ respectively, then show that $S_3=3(S_2-S_1)$

asked Mar 28, 2014 by rvidyagovindarajan_1

1 answer

If the sum of three numbers in A.P. is $24$ and their product is $440$, then find the numbers.

asked Mar 28, 2014 by rvidyagovindarajan_1

1 answer

Show that the sum of $(m+n)^{th}$ and $(m-n)^{th}$ terms of an A.P is twice its $m^{th}$ term.

asked Mar 27, 2014 by rvidyagovindarajan_1

1 answer

Find the sum of $n$ terms of the series whose $n^{th}$ term is $(2n-1)^2$

asked Mar 27, 2014 by rvidyagovindarajan_1

1 answer

Find the sum of $n$ terms of the series whose $n^{th}$ term is given by $n^2+2^n$.

asked Mar 24, 2014 by rvidyagovindarajan_1

1 answer

Find the sum of $n$ terms of the series whose $n^{th}$ term is given by $n(n+1)(n+4)$

asked Mar 24, 2014 by rvidyagovindarajan_1

1 answer

Find the sum to $n$ terms of the series $1^2+(1^2+2^2)+(1^2+2^2+3^2)+........$

asked Mar 24, 2014 by rvidyagovindarajan_1

1 answer

Describe A and B :

asked Mar 24, 2014 by pady_1

0 answers

Match the following:

asked Mar 24, 2014 by pady_1

1 answer

Match the following: 1. Chromoplasts----a. carbohydrates, 2. amyloplasts---b. oil and fat, 3. aleuroplasts---c. carotene , 4. elaioplasts---d.protein

asked Mar 24, 2014 by pady_1

1 answer

Amino acids are linked by a _ bond while the monosaccharides are held by _ bond

asked Mar 24, 2014 by pady_1

1 answer

Haem is a __ in the active site of peroxidases while NAD is a _

asked Mar 24, 2014 by pady_1

1 answer

Non-protein components that are required to make the enzyme active are called

asked Mar 24, 2014 by pady_1

1 answer

Competitive inhibitor of succinate dehydrogenase is ___

asked Mar 24, 2014 by pady_1

1 answer

Enzymes that catalyse removal of groups from substrates by mechanisms other than hydrolysis are

asked Mar 24, 2014 by pady_1

1 answer

The inhibitor that resembles the substrate in its structure is called

asked Mar 24, 2014 by pady_1

1 answer

The velocity of an enzymatic reaction upon increasing the substrate concentration: X axis: Substrate concentration Y= reaction velocity

asked Mar 24, 2014 by pady_1

1 answer

All enzymes enhance the rate of the reaction by

asked Mar 24, 2014 by pady_1

1 answer

The activity of enzyme depends on

asked Mar 24, 2014 by pady_1

1 answer

The differnce in the average energy content of the substrate from the that transition state is called

asked Mar 24, 2014 by pady_1

1 answer

Find X,Y and Z: C6H12O6----> aerobic--->X ;C6H12O6----> anaerobic--->Y; C6H12O6----> in Yeast--->Z

asked Mar 24, 2014 by pady_1

0 answers

The catalytic site in an enzyme is called ___

asked Mar 24, 2014 by pady_1

1 answer

Which of the following is true: The rate of a reaction is a. rate of product formed per unit time b. dependdent on temperature c. depends on the presence of catalyst d.rate of the reaction doubles for every 1 degree raise in temperature

asked Mar 24, 2014 by pady_1

0 answers

nucleic acids that behave like enzymes are called

asked Mar 24, 2014 by pady_1

1 answer

____ is called the energy currency of the living systems

asked Mar 24, 2014 by pady_1

1 answer

The biomolecules in a living organism are in a/an ______

asked Mar 24, 2014 by pady_1

0 answers

Anabolic pathways_ while catabolic pathways

asked Mar 24, 2014 by pady_1

1 answer

Conversion of glucose into lactic acid is an example of ___pathway

asked Mar 24, 2014 by pady_1

1 answer

Proteins that catalyse biological reactions are called

asked Mar 24, 2014 by pady_1

1 answer

Biosynthetic pathways are _ while degradative pathways are _

asked Mar 24, 2014 by pady_1

1 answer

Decarboxylation of an aminoacid results in an____

asked Mar 24, 2014 by pady_1

1 answer

A and T are linked by hydrogen bonds and G and C have _ Hydrogen bonds between them

asked Mar 24, 2014 by pady_1

1 answer

The pitch of the DNA is ____

asked Mar 24, 2014 by pady_1

1 answer

In a nucleic acid, bond between the phosphate and hydroxyl group of sugar is a/an ___ bond

asked Mar 24, 2014 by pady_1

1 answer

The backbone of the DNA is made of

asked Mar 24, 2014 by pady_1

1 answer

The formation of a peptide bond is a ___ reaction

asked Mar 24, 2014 by pady_1

1 answer

Match the following:

asked Mar 24, 2014 by pady_1

1 answer

Ask Questions, Get Answers