Question

resolva

a)
${9}^{x} - 4 \times {3}^{x} > 0$
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Answer 1

9^x - 4•3^x > 0

9^x > 4•3^x

9^x/3^x > 4

(9/3)^x > 4

3^x > 4

x > log4/log3