a)f(-3) = 3 - 2(-3) = 3 + 6 = 9f(0) = 3 - 20 = 3f(2.5) = 3 - 2*2.5 = 3 - 5 = -2
б)1) f(x) = -173 - 2x = -17-2x = -20x = 10
2) f(x) = 03 - 2x = 0-2x = -3x = 1.5
3) f(x) = 1173 - 2x = 117-2x = 114x = -57
a)
f(-3) = 3 - 2(-3) = 3 + 6 = 9
f(0) = 3 - 20 = 3
f(2.5) = 3 - 2*2.5 = 3 - 5 = -2
б)
1) f(x) = -17
3 - 2x = -17
-2x = -20
x = 10
2) f(x) = 0
3 - 2x = 0
-2x = -3
x = 1.5
3) f(x) = 117
3 - 2x = 117
-2x = 114
x = -57