<span><span>f′</span>(x)=<span><span>(<span>4⋅<span>x3</span>−2⋅<span>x2</span></span>)</span>′</span>=</span><span>=<span><span>(<span>4⋅<span>x3</span></span>)</span>′</span>−<span><span>(<span>2⋅<span>x2</span></span>)</span>′</span>=</span><span>=4⋅<span><span>(<span>x3</span>)</span>′</span>−2⋅<span><span>(<span>x2</span>)</span>′</span>=</span><span><span>=12⋅<span>x2</span>−4⋅x</span></span>
3х-х<9.2+6.4;
2х<15.6;
<span>х<7.8</span>
<span>6(2-2x)+2(-8+5x)=-5</span>
2/3= 2*4/3*4=8/12=2/3
5/7= 5*2/7*2=10/14=5/7
3/4= 3*10/4*10=30/40=3/4
2/5= 2*8/5*8=16/40=2/5
А там эти пятый и шестой домой не задавали?