Math, asked by syashpratap899, 3 months ago

Find the coefficient of ^2 in the expansion of (3x - 1 / x)^6.

Answers

Answered by sUnRiSeBlUeS

2

=64−192x+240x

=2−160x 3+20x 4 −12x 5 +x6

Coefficient of x² is 240

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