Q11 of 51 Page 18

Mark the correct alternative in the following :
If in the expansion of occurs in r^th term, then

Given:

⇒ x^4(15-k)-3k = x^-17

⇒ 60-4k-3k = -17

⇒ -7k = -77

⇒ k= 11

So, the term is 12^th term.

Mark the correct alternative in the following :

If in the expansion of , the coefficients of and terms are equal, then the value of r is

Mark the correct alternative in the following :

The middle term in the expansion of is

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In the expansion of , the term independent of x is

Mark the correct alternative in the following :

If in the expansion of (1 + y)ⁿ, the coefficients of 5^th, 6^th and 7^th terms are in A.P., then n is equal to

Mark the correct alternative in the following :If in the expansion of occurs in rth term, then