Question

differentiation.
There is a sketch that shows the graph y= 4/x^2 +x. I have already differentaited this. The question I am having trouble with is the one after it:
Show that the point (-2,-1) lies on the curve.
How am I meant to prove this?

Answer 1

replace x with -2 and see if you get y= -1

Answer 2

evaluate
y= 4/x^2 +x
with x=-2

Answer 3

Oh. Sorry, yeah I should have remembered that! Thank you!