5. 函數曲線y = x2-x+1在點x0=2處的法線方程式為何? (A) 3y+x-5=0 (B) 3y-x+5= 0 (C) 3y+x-11=0 (D) 3y-x+11=0

8. 若x siny=y sinx,則 \( \frac{dy}{dx} \)是:(A)\( \frac{2x \sin y + y^2 \cos x}{2y \sin x + x^2 \cos y} \)(B) \( \frac{2x \sin y - y^2 \cos x}{2y \sin x + x^2 \cos y} \)(C)\( \frac{2x \sin y + y^2 \cos x}{2y \sin x - x^2 \cos y} \)(D)\( \frac{2x \sin y - y^2 \cos x}{2y \sin x - x^2 \cos y} \)