could someone help me out with 14? i tried it and I get that it uses chain rule and second derivative but I’m so lost please hel
p
1 answer:
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So in order to get all the fractions to have a common denominator, we need to multiply by
, and
by
:
Now,
As long as and
(which we can't have because otherwise
), we can cancel
in the denominators on both sides:
We can factorize the right side:
which tells us that and
are solutions.