а^2+5>_10(a-2) Докажите неравенство. Created by minkaeva. algebra-ru

а^2+5>_10(a-2) Докажите неравенство...

August 2022 1 10 Report

а^2+5>_10(a-2)
Докажите неравенство

Answers & Comments

SonRiDol А^2+5>_10а-20
а^2-10а+5+20>_0
а^2-10а+5+20=0
a^2-10a+25=0
D=100-4×25×1=100-100=1
10+-1
a1,2=---------
2
a1=11/2=5,5
a2=9/2=4,5

[5,5;+знак бесконечности)

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