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. x^{0}

For

a=3x, and n=15

We have a formula,

Now, to get coefficient of term independent of xthat is coefficient of x^{0} we must have,

(x)^{15-3r} = x^{0}

• 15 - 3r = 0

• 3r = 15

• r = 5

Therefore, coefficient of x^{0}

__Conclusion__ : coefficient of x^{0}

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