Question

Find the indefinite integral:

Integrand of (e^2x)+(e^-9x)

which one do I set as u?

Answer 1

dont use u substitution, rather integrate by term

Answer 2

integrand (e^2x)dx + integrand (e^-9x)dx
e^(2 x)/2-1/9 e^(-9 x)+constant

Answer 3

ok i see.. just distribute the integrand out for each natural log