5х-2≥3х-4;
5х-3≤4-х;
х≥-1;
х≤1;
х є[-1;1]
<span>f(0)=-3(0)²+10=3*0+10=0+10=10</span>
Ab/c+ac/b+bc/a-(a+b+c)=(a²b²+a²c²+b²c²-a²bc-b²ac-c²ab)/(abc)=
=(a²(b-c)²+b²(a-c)²+c²(a-b)²)/(2abc)≥0, при аbc>0.
см.влож
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<span>сократите дробь
(z^2−28z+196)/(14−z )=(z-14)</span>²/(14-z)=(14-z)²/(14-z)=(14-z)