Question

St which points does the graph of y=(x)/(x^2+9) have a horizontal tangent line?

Answer 1

\[\frac{ x }{ x ^{2} +9}\]

Answer 2

Are you familiar with gradients, or differentiating? Hint: when you differentiate an curve equation you obtain the gradient of the tangential line a certain point. What will the gradient of a horizontal line be?

Answer 3

i am not good at the differentiating. i don't really understand what that is.

Answer 4

Hmmm. That might be difficult to show online. You might want to read books or search online on that. Btw, what level math are you in now?

Answer 5

cal BC as a junior. i skipped precal

Answer 6

Oh my. Hmm this might be difficult for me. This might help: http://www.mathtutor.ac.uk/differentiation

Answer 7

thanks