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If the coefficients of x^(2) and x^(3)ar...

If the coefficients of `x^(2)` and `x^(3)`are both zero, in the expansion of the expression `(1 + ax + bx^(2)) (1 - 3x)^15` in powers of x, then the ordered pair (a,b) is equal to
(A)` (28, 315)`
(B)`(-21, 714) `
(C) `(28, 861)`
(D) `(-54, 315)`

A

(28, 315)

B

(28, 861)

C

`(-21, 714)`

D

`(-54, 315)`

Text Solution

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The correct Answer is:
A
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