1.

int(x^(6)+7x^(5)+6x^(4)+5x^(3)+4x^(2)+3x+1)e^(x)dx=.......+c

Answer»

`sum_(i=0)^(7)X^(i)E^(x)`
`sum_(i=1)^(6)x^(i)e^(x)`
`sum_(i=0)^(6)ie^(x)`
`sum_(i=0)^(6)(XE)^(i)`

ANSWER :B


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