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Amiraneli [1.4K]
3 years ago
6

Given f(x) = 3x + 4. Find F-1(7) Please help I’ll give you brainiest answer 100points!!!!!

Mathematics
1 answer:
Musya8 [376]3 years ago
6 0

Answer:

f⁻¹(7) = 1

Step-by-step explanation:

Step 1: Write out function

f(x) = 3x + 4

Step 2: Find f⁻¹(x) (or known as inverse f(x))

y = 3x + 4

x = 3y + 4

-3y + x = 4

-3y = 4 - x

y = -4/3 + x/3

Step 3: Plug in 7 into inverse f(x)

f⁻¹(7) = 7/3 - 4/3

f⁻¹(7) = 3/3

f⁻¹(7) = 1

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