Помогите, пожалуйста![tex]4^ x^{+2} - 4^x \geq 240[/tex]. Created by Shamit. algebra-ru

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Shamit @Shamit

July 2022 1 3 Report

Помогите, пожалуйста!
[tex]4^ x^{+2} - 4^x \geq 240[/tex]

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dtnth

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$4^{x+2}-4^x \geq 240$
$4^2*4^x-4^x \geq 240$
$16*4^x-1*4^x \geq 240$
$15*4^x \geq 240$
$4^x \geq 240:15$
$4^x \geq 16$
$4^x \geq 4^2$
4>1
$x \geq 2$
x є $[2;+\infty)$

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