Question

Assertion: Number of terms in the expansion of $\left[(3x+y{)}^8-(3x-y{)}^8\right]$ is $4$
Reason: If $n$ is even, then $\left\{(x+a{)}^n-(x-a{)}^n\right\}$ has $\frac{n}{2}$ terms.

• A. Assertion is correct, reason is correct; reason is a correct explanation for assertion.
• B. Assertion is correct, reason is correct; reason is not a correct explanation for assertion
• C. Assertion is correct, reason is incorrect
• D. Assertion is incorrect, reason is correct.

Answer 1

Answer: (A)

Correct answer is (a) Assertion is correct, reason is correct; reason is a correct explanation for assertion.