Q20Multiple choice
The two successive terms in the expansion of (1 + x)24 whose coefficients are in the ratio 1:4 are
- (A)3rd and 4th
- (B)4th and 5th
- (C)5th and 6th
- (D)6th and 7th Cr 1 r +1 1 [Hint: 24 = ⇒ 4r + 4 = 24 – 4 ⇒ r = 4 ] Cr + 1 4 24 − r 4
The two successive terms in the expansion of (1 + x)24 whose coefficients are in the ratio 1:4 are