(a) If x r = r(r 1) (2r 5), calculate (b)If x r = r...

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(a) If xr = r(r – 1) (2r – 5), calculate

4 r=0 X

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

qui r=1 Xy

(c) If xr = r2 – 3r + 1, calculate

6  X. r=2

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