Hi, Re: domain of a composite fumction...Please Post on site , so others may benefit from the information. 

Posting questions relating to e^x and e^(-x)

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 (1/7)^x =  7^-x = 343 = (7)^3

                -x = 3

                 x = -3



CHECKING our Answer***

(1/7)^(-3) = 1^-3/7^-3 = 7^3/1 = 343



Graph: y = 1-log(x)  When x = 1, log(1) = 0 and y = 1  and when x = 10, y = 0

Plot Pt(1,1)& Pt(10,0) and use the y-axis as an asymptote

Might recommend the FREE graph software at  http://www.padowan.dk.com

 

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