(a). Σ(+1)(z +1), |z +1] < 1, j=0 (b). sin® z = Σ(-1) (2j +1) 4 j=0 (c). ez 1. = - Show that = 1 + 2z+ 3(1-9³) 2j+1 + 8 3 |z < ∞, + ..., |z| < 1.

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