Answer:
x = 2√7
using Pythagoras theorem:
For the bottom part:
We have

and

so the equation is indeed exact. So we want to find a function
such that


Integrating both sides of the first equation wrt
gives

Differentiating both sides wrt
gives

So we have

or

you surface area is 1476.66
1/6³ is simply multiplying the fraction 3 times.
or the numerator 3 times and the denominator 3 times.
It can be: 1/6 * 1/6 * 1/6 = <u>1 * 1 * 1 </u> = <u> 1 </u>
6 * 6 * 6 216<u />
or <u> 1³ </u> = <u> 1 </u>
6³ 216