JEE MATHEMATICS MCQ: MATHEMATICAL INDUCTION

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Analyzing +4 | -1

Let

S_{K}=\frac{1+2+\ldots+K}{K}

and

\sum\limits_{{j=1}}^{n} S_{j}^{2}=\frac{n}{A}\left(B n^{2}+C n+D\right)

, where

A, B, C, D \in \mathbb{N}

and

A

has least value. Then

View answer and explanation

Correct option: D

A+B

is divisible by

D

Option D (

A+B

is divisible by

D

) is correct because when the given expression is simplified and the values of A, B, and D are substituted, the condition holds true.

More Questions from MATHEMATICAL INDUCTION

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\frac{1^2}{3}+\frac{1^2+2^2}{5}+\frac{1^2+2^2+3^2}{7}+\ldots

n

P\left( n \right):2 + 4 + 6 \ldots + \left( {2n} \right),\;n \in N,

\begin{array}{l} P\left( k \right) = k\left( {k + 1} \right) + 2\mathrm{implies}\\ P\left( k \right) = \left( {k + 1} \right)\left( {k + 2} \right) + 2 \end{array}

k \in N.

P\left( n \right) = n\left( {n + 1} \right) + 2

n

n

a\left( n \right) = 1 + \frac{1}{2} + \frac{1}{3} + \frac{1}{4} + ... + \frac{1}{{\left( {{2^n}} \right) - 1}}.

n(n+1)(n+2)(n+3)

n \in N

12 {~N}

8 {~m}

6 {~m}