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Q22 of 70 Page 371

Find the 9^th term in the expansion of .

To find: 9^th term in the expansion of

Formula used: (i)

(ii) T_r+1 = ⁿC_r a^n-r b^r

For 9^th term, r+1=9

⇒ r = 8

In,

9^th term = T₈₊₁

⇒ ¹²C₈

⇒

⇒ 495

⇒

Ans)

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