Question

I'm in need of MAJOR help.. I have a test tomorrow in calc 1 for engineers and I'm so lost!

Find d^2y/dx^2

a). sinx+x^2y=1

b). e^(2y)+x=y

PLEASE help explain how to do these

Answer 1

When you take the derivative of a y term, multiply by dy/dx

Answer 2

cosx+2x*dy/dx=0?

Answer 3

close. you actually have to use the product rule for the x^2y part

Answer 4

x^2 is one function and y is the other

Answer 5

cos x + 2xy + x² dy/dx = 0

Answer 6

okay so whats the next step, take the derivative of that?