find the 13th term in the expansion of (9x-1/3underroot x)(^)18

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find the 13th term in the expansion of (9x-1/3underroot x)(^)18

Paras Gadal 19th Nov, 2019

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Answer (1)

kausthub kodamagulla 1st Dec, 2019

Hello paras,

for this question you can apply binomial expansion of (a+b) n =

n C 0 a n + n C 1 a n-1 b+......+ n C n bn

so,

the 13th term will be 18 C 13 (9x) 13 /3 5 x 5/2

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