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March 4, 2015

March 4, 2015

Posted by **Jane** on Sunday, December 5, 2010 at 11:54pm.

∫[( 7 e^(7 √x))/ √x] dx

∫[(2 x + 5)/( x^2 + 5 x + 2)] dx

- Calculus -
**drwls**, Monday, December 6, 2010 at 12:12pmLet x^2 +5x +2 = u

That makes du = (2x +5) dx

So your integral becomes du/u = ln u = ln (x^2 + 5x + 2)

Try a similar substitution technique with the others.

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