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Find the local extrema

Mathematics
Tutor: None Selected Time limit: 1 Day

Find the local extrema if f(x)=x^4-8x^2+1

Apr 3rd, 2015

find the derivative then make it equal to 0, then solve for x

F'(x)= 4x^3-16x=0

4x(x^2-4)

4x(x+2)(x-2)=0

x=2

Apr 3rd, 2015

oh don't forget there are 2 more answers: 0 and -2.

Apr 3rd, 2015

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