題目 Problem y=f(x)y=f(x)y=f(x) satisfies dydx=2yx\dfrac{\mathrm{d}y}{\mathrm{d}x}=2^{\frac{y}{x}}dxdy=2xy. When x=1x=1x=1, y=2y=2y=2, what is f(x)f(x)f(x)? (10%)(10\%)(10%) 解答
