Реши уравнения из номеров 3, 4 и 5

3. a) $f(5) = 5^3 - 10 = 125 - 10 = 115$ б) $f(4) = 4^3 - 10 = 64 - 10 = 54$ в) $f(2) = 2^3 - 10 = 8 - 10 = -2$ г) $f(-3) = (-3)^3 - 10 = -27 - 10 = -37$ 4. $\varphi(0) = 0^2 + 0 + 1 = 1$ $\varphi(1) = 1^2 + 1 + 1 = 3$ $\varphi(2) = 2^2 + 2 + 1 = 7$ $\varphi(3) = 3^2 + 3 + 1 = 13$ $\varphi(0) + \varphi(1) + \varphi(2) + \varphi(3) = 1 + 3 + 7 + 13 = 24$ 5. a) $f(x) = 17$ $-5x + 6 = 17$ $-5x = 11$ $x = -\frac{11}{5} = -2.2$ б) $f(x) = -3$ $-5x + 6 = -3$ $-5x = -9$ $x = \frac{9}{5} = 1.8$ в) $f(x) = 0$ $-5x + 6 = 0$ $-5x = -6$ $x = \frac{6}{5} = 1.2$ *Перевод:* 3. a) $f(5) = 5^3 - 10 = 125 - 10 = 115$ б) $f(4) = 4^3 - 10 = 64 - 10 = 54$ в) $f(2) = 2^3 - 10 = 8 - 10 = -2$ г) $f(-3) = (-3)^3 - 10 = -27 - 10 = -37$ 4. $\varphi(0) = 0^2 + 0 + 1 = 1$ $\varphi(1) = 1^2 + 1 + 1 = 3$ $\varphi(2) = 2^2 + 2 + 1 = 7$ $\varphi(3) = 3^2 + 3 + 1 = 13$ $\varphi(0) + \varphi(1) + \varphi(2) + \varphi(3) = 1 + 3 + 7 + 13 = 24$ 5. a) $f(x) = 17$ $-5x + 6 = 17$ $-5x = 11$ $x = -\frac{11}{5} = -2.2$ б) $f(x) = -3$ $-5x + 6 = -3$ $-5x = -9$ $x = \frac{9}{5} = 1.8$ в) $f(x) = 0$ $-5x + 6 = 0$ $-5x = -6$ $x = \frac{6}{5} = 1.2$