SATHEE: Binomial Theorem And Its Simple Applications Question 146

Binomial Theorem And Its Simple Applications Question 146

Question: If ’n’ is a positive integer, then $ n^{3}+2n $ is divisible by

Options:

A) 3

B) 2

C) 6

D) 15

Show Answer

Answer:

Correct Answer: A

Solution:

For n = 1

$n^3 + 2n = 1^3 + 2(1) = 3$ which is divisible by 3

∴ $n^3 + 2n$ is divisible by 3 for all smallest positive integers

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Binomial Theorem And Its Simple Applications Question 146

Question: If ’n’ is a positive integer, then $ n^{3}+2n $ is divisible by

Options:

Answer:

Solution:

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