SOLUTION: what is log base x of 7= -2

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Question 632113: what is log base x of 7= -2
Answer by stanbon(75887) About Me  (Show Source):
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what is log base x of 7= -2
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base "x"
log = exponent = -2
result = 7
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x^(-2) = 7
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1/x^2 = 7
x^2 = 1/7
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x = sqrt(7)/7