If the sum of the binomial coefficients of the (x2 − 1x) n expansion is 32, then the coefficient of the term with X4 in the expansion is () A. 10B. -10C. -5D. 5

From the sum of binomial coefficients of (x2 − LX) n expansion is 2n = 32, n = 5 can be obtained, and the general term formula of (x2 − LX) n expansion is tr + 1 = Cr5 · (- 1) r · x10-3r, let 10-3r = 4, and R = 2, then the coefficient of the term containing X4 in the expansion is C25 = 10, so a

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