You are not logged in.
Post a reply
Topic review (newest first)
sorry i miswrote dx2 instead of du2. i've edited the post
You said ". i need to prove that d2f/dx2 + d2f/dv2 = 0.".
Hi, I have a function f(x,y). u = ax + by and v = bx - ay. a and b are constants. i need to prove that d2f/du2 + d2f/dv2 = 0.