§ Задание 158
\[1)\ f(x) = 3x;\]
\[f^{'}(x) = 3.\]
\[2)\ f(x) = - 4x;\]
\[f^{'}(x) = - 4.\]
\[3)\ f(x) = - 5x + 7;\]
\[f^{'}(x) = - 5.\]
\[4)\ f(x) = - 7x + 8;\]
\[f^{'}(x) = - 7.\]
\[1)\ f(x) = 3x;\]
\[f^{'}(x) = 3.\]
\[2)\ f(x) = - 4x;\]
\[f^{'}(x) = - 4.\]
\[3)\ f(x) = - 5x + 7;\]
\[f^{'}(x) = - 5.\]
\[4)\ f(x) = - 7x + 8;\]
\[f^{'}(x) = - 7.\]