Question

The co-efficient of x² in 3x²+2x3 = x + I is
​

Answer 1

The general term is

t

r

=

9

C

r

.(−1)

9−r

.(2x)

r

.(

x

2

3

)

9−r

If the power of x in above general term should be 3, we have,

r−2(9−r)=3 which gives r=7.

Putting this value of r in the general term expression, we get the coefficient of x

3

Answer 2

Answer:

l think the answer is 3 . it is coefficient