Find first four terms of the indicated expansion by use of the binomial series.(1 - 3)7

A. 1 - 21 + 63x - 105x + . . .
B. 1 - 21 + 189x - 945x2 + . . .
C. 1 + 21 - 189x + 945x - . . .
D. 1 - 21 + 189x - 945x + . . .

Answer: D

Mathematics

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