y = 2·x^4·LN(x)
f = 2·x^4----> f' = 8·x^3
g = LN(x)-----> g' = 1/x
y' = 8·x^3·LN(x) + (2·x^4)·(1/x) =
=8·x^3·LN(x) + 2·x^3=
=2·x^3·(4·LN(x) + 1)
-----------------------
Analogamente:
y''=
=24·x^2·LN(x) + 14·x^2=
=2·x^2·(12·LN(x) + 7)
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