Evaluate
\frac{160000}{n^{2}+2}
Differentiate w.r.t. n
-\frac{320000n}{\left(n^{2}+2\right)^{2}}
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\frac{20^{4}}{n^{2}+2}
Add 2 and 2 to get 4.
\frac{160000}{n^{2}+2}
Calculate 20 to the power of 4 and get 160000.
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