Question

If y=x+1/x+2 find d²y/dx²​

Answer 1

Answer:

first find dy/dx = 1 + d/dx(1/x) + 0

= 1 + d/dx(x^-1)= 1 + (-1x^-1)

d/dx(dy/dx) = d/dx(-x^-1) = -(-2)x^-2= 2x^-2= 2/x^2