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2 5
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x ∈ [5 ; + ∞)
Ответ: 5
cos^25П/12-sin^25П/12=cos5П/6=cos(П-П/6)=-cosп/6=-sqrt(3)/2
<span>y=x−8
у= 0-8
у=-8
(</span><span>0;-8)</span>
3m+1/3m²-27n² * 3m+9n/2+6m = 3m+1/3(m²-9n²) * 3(m+3n)/2(1+3m) = (3m+1)*3(m+3n)/3(m-3n)(m+3n)*2(1+3m) = 1/2m-6n