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Further applications of differentiation — Question 63

Original QCE Vault practice · 1 mark

Q63 · Practice questionTechnology-freeSimple familiar1 mark

QUESTION 63

For f(x)=x4−4x2f(x)=x^4-4x^2, the local maximum occurs at
(A)
x=−2x=-\sqrt2
(B)
x=0x=0
(C)
x=2x=\sqrt2
(D)
x=±2x=\pm2
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