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int (sum(r = 0)^(infty) (x^(r) 3^(r))/(r...

`int (sum_(r = 0)^(infty) (x^(r) 3^(r))/(r!) ) ` dx =

A

`e^(x) + c `

B

`(e^(3x))/(3) + c `

C

`(-3)/(1 - 3x)` + c

D

`3e^(3x)+c`

Text Solution

Verified by Experts

The correct Answer is:
B
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