(Solved): (1) The special integrating factor \( \mu(x) \) of \( \left(2 x^{2}+2 y\right) d x+\left(x^{2} y-2 ...

(1) The special integrating factor \( \mu(x) \) of \( \left(2 x^{2}+2 y\right) d x+\left(x^{2} y-2 x\right) d y=0 \) that required to convert this equation to exact equation is (a) \( \frac{1}{x^{2}} \) (b) \( -2 x \) (c) \( \frac{1}{x} \) (d) \( x^{2} \)