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Question-146529




Question Number 146529 by 0731619 last updated on 13/Jul/21
Answered by Olaf_Thorendsen last updated on 14/Jul/21
Let x = 5+ε  ((x!!!−10)/(x−5)) = (((5+ε)(2+ε)−10)/(5+ε−5))  = ((7ε+ε^2 )/ε) ∼_(ε→0) 7
$$\mathrm{Let}\:{x}\:=\:\mathrm{5}+\epsilon \\ $$$$\frac{{x}!!!−\mathrm{10}}{{x}−\mathrm{5}}\:=\:\frac{\left(\mathrm{5}+\epsilon\right)\left(\mathrm{2}+\epsilon\right)−\mathrm{10}}{\mathrm{5}+\epsilon−\mathrm{5}} \\ $$$$=\:\frac{\mathrm{7}\epsilon+\epsilon^{\mathrm{2}} }{\epsilon}\:\underset{\epsilon\rightarrow\mathrm{0}} {\sim}\mathrm{7} \\ $$

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