SOLUTION: Solve the following. eliminate extraneous solutions. a 7^2x+1=4^x-2 b. 4^x= 3+18(4^-x) c. 9= log _5(x+100)+6

Algebra ->  Logarithm Solvers, Trainers and Word Problems -> SOLUTION: Solve the following. eliminate extraneous solutions. a 7^2x+1=4^x-2 b. 4^x= 3+18(4^-x) c. 9= log _5(x+100)+6       Log On


   

Question 1043511: Solve the following. eliminate extraneous solutions.
a 7^2x+1=4^x-2
b. 4^x= 3+18(4^-x)
c. 9= log _5(x+100)+6
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
a 7^2x+1=4^x-2
Ambiguous.
Is the exponent of 7 2x? or 2x+1?
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b. 4^x= 3+18(4^-x)
No algebraic solution.
Use graphical or iterative methods.
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c. 9= log _5(x+100)+6
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