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Find x3+5x+1x3dx...

Find x3+5x+1x3dx

A.

x2+10x+c

B.

x+53x3+x4+c

C.

x5x22x3+c

D.

x5x12x2+c

Correct answer is D

x3+5x+1x31+5x2+1x3

(1+5x2+1x3)dx=(1+5x2+x3)dx

= (x5x112x2+c)

= x5x12x2+c.