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CGP EDU Academic Team
Published on: August 14, 2026
If sum of all the coefficients in the expansion of (x 3/2 + x –1/3 ) n is 128, then the coefficient of x 5 is -
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Verified by ExpertsThe correct answer is:
A
Sum of all coefficients,
Put x = 1, 2 n = 128 0 ⇒ n = 7
Now in (x 3/2 + x –1/3 ) 7 , r = 
= 
= 3
T 4 = 7 C 3 = 35
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