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