Question: (a) If x r = r(r 1) (2r 5), calculate (b)If x r = r r + 1 + 3(1) r , calculate
(a) If xr = r(r – 1) (2r – 5), calculate

(b) If xr = rr + 1 + 3(–1)r, calculate

(c) If xr = r2 – 3r + 1, calculate

4 r=0 X
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