Question

In the expansion (3x - 1/x^2 )^15 find the term free fron x​

Answer 1

Given Expression (3x - 2/x2)15

T,. = 1°C, (3x)'5 -

= l*C, 315 -r x15 - 3r (-2Y

For the term independent of x,

15 - 3r = 0 = r= 5

:The term independent of x is

T3.-"C, 315 - (-2)° %3!

15 x 14 x 13 x12 x11x10!

5x 4x3x2x1x10!

= -3003 x 310 x 25

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