Question

The integrating factor of (1 + x²) dy/dx + xy = (1 + x²)³ is _______ 

(a) √(1 + x²)

(b) log(1 + x² ) 

(c) \(e^{tan^{-1}}\)x

(d) \(log^{tan^{-1}}x\)

Answer 1

(a) √(1 + x²)