Q. 40 D5.0( 1 Vote )

Find the term independent of x in the expansion of :

Answer :

To Find : term independent of x, i.e. x0


a=3x, and n=15

We have a formula,

Now, to get coefficient of term independent of xthat is coefficient of x0 we must have,

(x)15-3r = x0

• 15 - 3r = 0

• 3r = 15

• r = 5

Therefore, coefficient of x0

Conclusion : coefficient of x0

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