Tuesday, July 31, 2012

How to determine the indefinite integral of e^square rootx/square rootx (substitution or parts) ?

We'll integrate using substitution or we'll change the
variable. For this reason, we'll consider the
formula:


We'll note sqrtx =
t.


We'll differentiate both
sides:


dx/2sqrtx = dt


dx/sqrtx
= 2dt


We'll re-write the integral in
t:


Int e^t*2dt = 2e^t +
C


We'll substitute t by sqrt
x:


Int e^sqrtx*dx/sqrtx = 2e^sqrtx +
C


The indefinite integral is evaluated using substitution
and the result is:


Int e^sqrtx*dx/sqrtx =
2e^sqrtx + C

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