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Re: x is greater or equal to zero [#permalink]
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Since the bases are both 5 (a positive integer), I suppose we could simply compare the exponent expressions (5x) and (x+5) and see that when x is 2,3,4,5, etc. A is larger but when x=0 then B is larger. Hence D.
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Re: x is greater or equal to zero [#permalink]
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Re: x is greater or equal to zero [#permalink]
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