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Andreas93 [3]
3 years ago
9

Calculus help??????

Mathematics
1 answer:
katen-ka-za [31]3 years ago
7 0
f(x)=\ln x\implies f'(x)=\dfrac1x
g(x)=x^2-1\implies g'(x)=2x

You have 2x^2>1 for all x\ge1, and dividing by x gives 2x>\dfrac1x, or g'(x)>f'(x). By the racetrack principle, then, it follows that g(x)>f(x).
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