a.Expand (1+x-2ax^2)^n , where n is a positive integer , in ascending powers of x up to the term x^2.
b.If the coefficients of x and x^2 are 7 and 0 respectively , find the values of n and a.
F.4 A.Math 題
2008-12-25 9:25 pm
回答 (1)
2008-12-25 10:31 pm
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