<span><span><span>−3</span>,<span><span><span>5<span>x2</span></span>+<span>6x</span></span>−0</span></span>,<span>5=0</span></span>
<span>Коэффициенты уравнения: </span>
<span><span>a=<span>−3</span></span>,5</span><span>, </span><span>b=6</span><span>, </span><span><span>c=<span>−0</span></span>,5</span>
<span>Вычислим дискриминант: </span>
<span><span>D=<span><span>b2</span>−<span><span>4a</span>c</span></span></span>=</span><span><span><span><span>62</span>−<span><span>4·<span>(<span><span>−3</span>,5</span>)</span></span>·<span>(<span><span>−0</span>,5</span>)</span></span></span>=<span>36−7</span></span>=29</span>
<span>(<span>D>0</span>)</span>, следовательно это квадратное уравнение имеет 2 различных вещественных корня:
Вычислим корни:
<span><span>x<span>(<span>1,2</span>)</span></span>=<span><span><span>−b</span>±<span>√D</span></span><span>2a
</span></span></span><span><span><span><span><span><span>x1</span>=<span><span><span>−b</span>+<span>√D</span></span><span>2a</span></span></span>=<span><span><span><span>−6</span>+5</span>,385</span><span>2·<span>(<span><span>−3</span>,5</span>)</span></span></span></span>=<span><span><span>−0</span>,615</span><span>−7</span></span></span>=0</span>,088
</span><span><span><span><span><span><span>x2</span>=<span><span><span>−b</span>−<span>√D</span></span><span>2a</span></span></span>=<span><span><span><span>−6</span>−5</span>,385</span><span>2·<span>(<span><span>−3</span>,5</span>)</span></span></span></span>=<span><span><span>−11</span>,385</span><span>−7</span></span></span>=1</span>,626</span>
<span><span><span>−3</span>,<span><span><span>5<span>x2</span></span>+<span>6x</span></span>−0</span></span>,<span><span>5=<span>0.5·<span><span>(<span><span>x−0</span>,088</span>)</span><span>(<span><span>x−1</span>,626</span>)</span></span></span></span>=0
</span></span>Ответ:
<span><span><span>x1</span>=0</span>,088</span>
<span><span><span>x2</span>=1</span>,<span>626</span></span>
0.25*600=150-----------------------------------------------------------------------
Ответ:
-60
Объяснение:
- 25 - 35 = ( то есть 25 + 35 , но со знаком "-") = -60
Взаимно простые числа - это числа, у которых нет общих делителей, кроме единицы.
при n = 2
3 · 2 + 1 = 7 и 5 · 2 + 3 = 13
при n = 4
3 · 4 + 1 = 13 и 5 · 4 + 3 = 23
при n = 6
3 · 6 + 1 = 19 и 5 · 6 + 3 = 33
при n = 8
3 · 8 + 1 = 25 и 5 · 8 + 3 = 43
при n = 10
3 · 10 + 1 = 31 и 5 · 10 + 3 = 53
при n = 20
3 · 20 + 1 = 61 и 5 · 20 + 3 = 103
при n = 30
3 · 30 + 1 = 91 и 5 · 30 + 3 = 153