1)
f(3) = 1/3 * 9 + 2*3 = 9
f(-1) = 1/3 *(-1)² + 2*(-1) = -1 2/3
1/3x² + 2x= 0
x(1/3x+2)= 0
x= 0
1/3x+3= 0
1/3x = -3
x = -3/ 1/3 = -3 * 3 = -9
нули функции = 0 и -9
1)
f(3) = 1/3 * 9 + 2*3 = 9
f(-1) = 1/3 *(-1)² + 2*(-1) = -1 2/3
1/3x² + 2x= 0
x(1/3x+2)= 0
x= 0
1/3x+3= 0
1/3x = -3
x = -3/ 1/3 = -3 * 3 = -9
нули функции = 0 и -9