  We study power law inflation in the context of non-minimally coupled to the
scalar curvature. We analyze the inflationary solutions under an exact analysis
and also in the slow roll approximation. In both solutions, we consider the
recent data from Planck and BICEP2 data to constraint the parameter in our
model. We find that the slow roll approximation is disfavored in the presence
of non-minimal couplings during the power law expansion of the Universe.
