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Question Number 176189 by Linton last updated on 14/Sep/22

solve for x (1+(1/x))^(x+1) =(1+(1/6))^6 show working

$${solve}\:{for}\:{x} \\ $$$$\left(\mathrm{1}+\frac{\mathrm{1}}{{x}}\right)^{{x}+\mathrm{1}} =\left(\mathrm{1}+\frac{\mathrm{1}}{\mathrm{6}}\right)^{\mathrm{6}} \\ $$$${show}\:{working} \\ $$

Answered by BaliramKumar last updated on 14/Sep/22

(((x+1)/x))^(x+1) = (1+(1/6))^6 ((x/(x+1)))^(−(x+1)) = (1+(1/6))^6 (((x+1−1)/(x+1)))^(−(x+1)) = (1+(1/6))^6 (1−(1/(x+1)))^(−(x+1)) = (1+(1/6))^6 put −(x+1) = y (1+(1/y))^y = (1+(1/6))^6 y = 6 −(x+1) = 6 x+1 = −6 x = −7 Answer

$$\left(\frac{{x}+\mathrm{1}}{{x}}\right)^{{x}+\mathrm{1}} \:=\:\left(\mathrm{1}+\frac{\mathrm{1}}{\mathrm{6}}\right)^{\mathrm{6}} \\ $$$$\left(\frac{{x}}{{x}+\mathrm{1}}\right)^{−\left({x}+\mathrm{1}\right)} \:=\:\left(\mathrm{1}+\frac{\mathrm{1}}{\mathrm{6}}\right)^{\mathrm{6}} \\ $$$$\left(\frac{{x}+\mathrm{1}−\mathrm{1}}{{x}+\mathrm{1}}\right)^{−\left({x}+\mathrm{1}\right)} \:=\:\left(\mathrm{1}+\frac{\mathrm{1}}{\mathrm{6}}\right)^{\mathrm{6}} \\ $$$$\left(\mathrm{1}−\frac{\mathrm{1}}{{x}+\mathrm{1}}\right)^{−\left({x}+\mathrm{1}\right)} \:=\:\left(\mathrm{1}+\frac{\mathrm{1}}{\mathrm{6}}\right)^{\mathrm{6}} \\ $$$${put}\:\:\:\:\:\:−\left({x}+\mathrm{1}\right)\:=\:{y} \\ $$$$\left(\mathrm{1}+\frac{\mathrm{1}}{{y}}\right)^{{y}} \:=\:\left(\mathrm{1}+\frac{\mathrm{1}}{\mathrm{6}}\right)^{\mathrm{6}} \\ $$$${y}\:=\:\mathrm{6} \\ $$$$−\left({x}+\mathrm{1}\right)\:=\:\mathrm{6} \\ $$$${x}+\mathrm{1}\:=\:−\mathrm{6} \\ $$$${x}\:=\:−\mathrm{7}\:\mathrm{Answer} \\ $$$$ \\ $$

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