1) 3x+4y=12 4y=12-3x
<br />k=-3/4 m=3<br /><br />2)7x-5y=35 5y=7x-35 y=7/5 x-7 k=7/5, m=-7 <br />
Решение
<span>7^(5х - 1) = 49
</span>7^(5х - 1) = <span>7</span>²
5x - 1 = 2
5x = 3
x = 3/5
Х вершины = -в/2а
y=-2x^2+8x+3; Хв = -8/(-2*2) =2 Ув=-2*4+16+3=11 (2,11)
y=-2x^2-8x+3. Хв = 8/(-2*2) = -2 Ув=-2*4+16+3=11 (-2,11)