Question

coeffcient of a in -3a​

Answer 1

$the \: coefficient \: of \: a \: is \: - 3$

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Answer 2

Answer:

Using binomial equation we know that

(p+q)

n

=

r=0

∑

n

n

C

r

p

n−r

q

r

In the given question p=3a, n=6 & q=−

3

2

∴ (3a−

3

2

)

6

=

r=0

∑

n

6

C

r

3a

6−r

l(−

3

2

)

r

On simplifying, we get

(3a−

3

2

)

6

=

81

16

−

9

32a

+24a

2

−72a

3

+81a

4