Saturday

April 18, 2015

April 18, 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.

**Answer this Question**

**Related Questions**

Integral Calculus - Solve using Integration by Substitution : ∫√x2-...

mathematics - ∫▒dx/(x√(2x^2+5x+1)) 2. ∫▒dx/(x&#...

Calculus - Find the integral by substitution ∫ [(16 x3)/(x4 + 5)] dx &#...

physics - 1.∫ x³(x+1)dx 2.∫ (1-cot²x)dx 3.∫ cosx(tan x + sec x...

physics - 1.∫ x³(x+1)dx 2.∫ (1-cot²x)dx 3.∫ cosx(tan x + sec x...

maths... - This is the entire question: A curve has the equation y=(x+2)√(...

physics - 1.∫ csc (u-π/2) cot (u-π/2) du. 2.∫ sec^2(3x+2)...

Calculus 2 correction - I just wanted to see if my answer if correct the ...

Calculus - evaluate each of the following integral:- I= ∫((x^2+ 1)/(x^4+ 1...

Help Evaluating Integrals - 1.) ∫ (2)/(x-4) dx 2.) ∫ sec^2x tanx dx ...