If f(x)=secx multiplied by (3x squared -7x), then F prime of (0)=
f (x) = (sec x)(3x 2 - 7x)
f (x) = (3x 2 - 7x) / cos x
Using quotient Rule
f '(x) = [ (cos x)(6x-7) - (-sin x)(3x 2-7x) ] / cos 2x
f '(0) = [ (cos0)(-7) + (sin0)(0) ] / cos 20
f '(0) = ( -7+0 ) / 1
f '(0) = -7
+118653 
