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Mathematics 23 Online
OpenStudy (anonymous):

Calculate the integral (1 to infinity) of e^(-x). Please indicate the limits evaluated.

OpenStudy (raden):

integral by subs let u=e^-x

OpenStudy (raden):

opssss.. u=-x, i meant

OpenStudy (anonymous):

I'm still lost, enlighten please?

OpenStudy (raden):

well, look here... let u = -x du=-dx or dx = -du so, the problem can be : |dw:1354689029489:dw|

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