(x - 3 - (3x - 2)) * (x - 3 + (3x - 2)) = 0;
(x - 3 - 3x + 2) * ( x - 3 + 3x - 2) = 0
( - 2x - 1) * ( 4x - 5) = 0
- 2x - 1 = 0;
- 2x = 1
x = - 1/2 = - 0,5
4x - 5 = 0
4x = 5
x = 5/4 = 1,25
Ответ:
- 0,5; 1.25
Ответ:
4/m-2/5m при m=1.5, то:
4/1.5-2/7.5=40/15-20/75
40/15-20/75=200/75-20/75=180/75=12/5=2 целых 2/5=2,4
А/(а²-b²) : a/(ab+b²)=a/(a+b)(a-b) * b(a+b)/a=b/(a-b)
если a=1.1, b=0.6, то
0,6/(1,1-0,6)=0,6/0,5=6/10 :5/10=6/10*10/5=6/5=1 1/5=1,2
Производная. Касательная. Площадь
Решение
<span>sin α = -4/5 и α ∈(3/2π;2π)
</span>sin²(α/2) = (1 - cosα)/2
cosα = √(1 - sin²α) = √(1 - (-4/5)²) = √9/25 = 3/5
sin²(α/2) = (1 - 3/5)/2
<span>sin²(α/2) = (2/5) : 2
</span><span>sin²(α/2) = 1/5
</span>sin(α/2) = √(1/5); sin(α/2) = √5/5
sin(α/2) = - √(1/5); <span>sin(α/2) = - </span>√5/5