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How do you solve $5^{x} \geq 625$ $5^x>=625$ ?

1 Answer

Aug 30, 2017

$x \geq 4$ $x>=4$

Explanation:

recognising the powers of $5$ $5$

$5^{1} = 5$ $5^1=5$

$5^{2} = 25$ $5^2=25$

$5^{3} = 125$ $5^3=125$

$5^{4} = 625$ $5^4=625$

so for

$5^{x} \geq 625$ $5^x>=625$

looking at the list we conclude

$x \geq 4$ $x>=4$

note that we require the equal sign

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