Thursday, February 29, 2024

Kisi Kisi PAT Matematika Kelas XI no 34

34. Jika 𝑓(π‘₯)=4π‘₯^2 βˆ’ 1, maka 𝑓 βˆ’1(π‘₯)=...

a. 1/2 √(π‘₯ + 1)

b. 1/2 √(π‘₯ βˆ’ 1)

c. 1/3 √(π‘₯ + 1)

d. 1/3 √(π‘₯ βˆ’ 1)

e. 1/4 √(π‘₯ βˆ’ 1)


Jawaban :

𝑓(π‘₯)=4π‘₯^2 βˆ’ 1

y = 4x^2 - 1

4x^2 = y + 1

x^2 = 1/4 (y + 1)

x = 1/2 βˆš(y + 1)

𝑓 βˆ’1(y) = 1/2 βˆš(y + 1)

𝑓 βˆ’1(x) = 1/2 βˆš(x + 1)


Jawaban : A


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