1.

The integrating factor of x(dy/dx) – y = x2 is _____ (a) -1/x(b) 1/x(c) log x (d) x

Answer»

(b) 1/x

x(dy/dx) - y = x2 ⇒ dy/dx - y/x = x

IF = e\(\int\)-1/x dx = e-logx = 1/x



Discussion

No Comment Found