Ответ:
Пошаговое объяснение:
начальное число≈до тысячных≈до сотых≈до десятых
2,68432≈2,684≈2,68≈2,7
24,6832≈24,683≈24,68≈24,7
57,38105≈57,381≈57,38≈57,4
Х моторов
х/6- должны
х/8- делали
х/6-х/8=3
(4х-3х)/24=3
х=24•3=72 мотора
<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>
280 / (у /12) - 14 = 0
280 = 14 *(у / 12 )
280 * 12 = 14у
14у = 3360
у = 3360/14
у = 240