In the binomial expansion \[{{(a+bx)}^{-3}}\] \[=\frac{1}{8}+\frac{9}{8}x+....\], then the value of a and b are:

In the binomial expansion \[{{(a+bx)}^{-3}}\] \[=\frac{1}{8}+\frac{9}{

1.	In the binomial expansion \[{{(a+bx)}^{-3}}\] \[=\frac{1}{8}+\frac{9}{8}x+....\], then the value of a and b are:
A.	a = 2, b = 3
B.	a = 2, b = -6
C.	a = 3, b = 2
D.	a = -3, b = 2
Answer» C. a = 3, b = 2

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In the binomial expansion \[{{(a+bx)}^{-3}}\] \[=\frac{1}{8}+\frac{9}{8}x+....\], then the value of a and b are:

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