SOLUTION: find x if 4^x+5^x=7^x

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Question 1074627: find x if 4^x+5^x=7^x
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
find x if 4^x+5^x=7^x
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There's no algebraic solution.
By graphing,
x =~ 1.5816234
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And, 4^x + 5^x - 7^x approaches zero as x approaches negative infinity.