Help with 30 please. thanks.​

See Below.

Step-by-step explanation:

We have the equation:

And we want to show that:

Instead of differentiating directly, we can first square both sides:

We can find the first derivative through implicit differentiation:

Hence:

And we can find the second derivative by using the quotient rule:

Substitute:

Simplify:

Combine fractions:

Simplify:

Simplify:

Q.E.D.

step-by-step explanation:

6.48/4 4 goes into 6.48 1.62 times