PDE, Vector Spaces, Laplace Transform

The solution of the equation z = px + qy + pq is____

• z = ax + by + pq

• z = ax + by + ab

• z = bx + ay + ab

• z = px + qy + ab

• z = yf(x)+g(x)

• z = yf(y)+g(x)

• z = xf(x)+g(x)

• z = xf(y)+g(x)

The solution of simultaneous linear differential  equations is of the form___

• 1,i,-i

• 1,-1,i

• i,-i,0

• 1,-1,0

The subsidiary equation for Lagrange's linear equation

Which of the following is clairaut's form