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Find the interval in which the function ...

Find the interval in which the function `f(x)=x^(4)+32x` is increasing or decreasing. `x in R`

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Verified by Experts

The correct Answer is:
In `(-2, oo)` increasing.
In `(-oo,2)` decreasing.
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KUMAR PRAKASHAN-APPLICATION OF DERIVATIVES -PRACTICE WORK
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  18. The equation of a particle in motion is S=(1)/(4)t^(4)-2t^(3)+4t^(2)-7...

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