poptropic7932
09.03.2020 •
Mathematics
I need help on both of these function questions please
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Ответ:
Ex. 5
A, B, D are functions.
Ex. 6
B, C are correct.
Ответ:
1. Replace f(x) with y.
2. Swap x and y.
3. Solve the equation for y.
f(x) = 2x - 10
1. y = 2x - 10
2. x = 2y - 10
3. Add 10 to both sides
x + 10 = 2y
Divide both sides by 2
(x + 10)/2 = y
y = (x + 10)/2
f^-1(x) = (x + 10)/2