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10 questions from this quiz
All real numbers except zero
f′(x)=−4x−5f'(x) = -4x^{-5}f′(x)=−4x−5
x−2x^{-2}x−2
R∖{0}\mathbb{R} \setminus \{0\}R∖{0}
000
f′(x)=−x−2f'(x) = -x^{-2}f′(x)=−x−2
111
−6x−4-6x^{-4}−6x−4
Any number to an even power is positive
x4x^4x4 is positive, so −3x4<0\frac{-3}{x^4} < 0x4−3<0
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