donnie7054ouqzit donnie7054ouqzit

21-08-2018
Mathematics

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If ƒ(x ) = 3x + 1 and and ƒ -1 = , then the ordered pair of ƒ(3) = (3, 10) (3, 2/3) (10, 3)

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choixongdong choixongdong

21-08-2018

ƒ(x ) = 3x + 1

Switch x and y to find inverse

x = 3y + 1

3y = x - 1

y = 1/3 x - 1/3

ƒ -1 = 1/3 x - 1/3

ƒ(x ) = 3x + 1

ƒ(3) = 3(3) + 1 = 10

Answer: (3, 10)

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