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OpenStudy (anonymous):
the function f(x)=x^4-4x^2 has how many mins and maxs?
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OpenStudy (tkhunny):
Possible or for sure?
OpenStudy (anonymous):
for sure
hero (hero):
Hint: Graph the function
hero (hero):
Alternatively, set f(x) = 0 0 = x^4 - 4x^2 0 = x^2(x^2 - 4)
hero (hero):
Solve for x from there
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