Hi, help with question 18 please. thanks​

See Below.

Step-by-step explanation:

We are given the equation:

And we want to prove that:

Find the first derivative by taking the derivative of both sides with respect to x:

Divide both sides by 2y:

Find the second derivative using the quotient rule:

Substitute:

Simplify:

Combine fractions:

Simplify:

Cancel:

Substitute:

Simplify. Hence:

Q.E.D.

10 miles

step-by-step explanation:

for me what is finding a good play list and going out because i can not lay down and relax so i usually go to a coffee shop. i also use the gum trick and this actually works. another advice is highlighting subjects it really does me remember certain things

step-by-step explanation: