I=

[integral from 1 to ln(8)] [integral from 0 to ln(y)] e^(x+y) dxdy

solving for the dx (inside) I get

(can I break e^(x+y) to (e^x)(e^y))

(e^y)(e^ln(y)) - e^(y)

(e^y)(e^ln(y) -1)

outer integral

e^((ln(y) -1 + y)) dy

Am I doing this wrong?

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- December 5th 2008, 10:39 PMkhuezyHelp with double integral of exponential
I=

[integral from 1 to ln(8)] [integral from 0 to ln(y)] e^(x+y) dxdy

solving for the dx (inside) I get

(can I break e^(x+y) to (e^x)(e^y))

(e^y)(e^ln(y)) - e^(y)

(e^y)(e^ln(y) -1)

outer integral

e^((ln(y) -1 + y)) dy

Am I doing this wrong? - December 5th 2008, 10:51 PMmr fantastic