Question 1 25 pts Solve the following differential equation. dy - 7xzy da O 1 y = + 0 .23 O y = Ce723 /s O 1 V= O y= elz /3 + C\fD Question 3 25 pts All differential equations are separable. O True O False D Question 4 25 pts In the method of separation of variables, we first write the differential dy equation da = f(x)g(y) as.. O dy g(y) f(x) O g(y) dy = f(x) d.x O g(y) dy = da f(x) O dy f(x) dx g(y)