Jika suatu fungsi diumumkan f(x) = 4x-8 maka tentukan A.nilai f(-5) B.nilai x jika f(x) =4

Question

Matematika Diposting : 2017-12-12 Diupdate : 2022-03-16 marsyandacantika

Pertanyaan

Jika suatu fungsi diumumkan f(x) = 4x-8 maka tentukan
A.nilai f(-5)
B.nilai x jika f(x) =4

Answer 1

a) f(-5)=-20-8
=-28

b)4=4x-8
4+8=4x
12=4x
3=x

Answer 2

f(x)=4x-8
maka
A. f(-5) = 4.(-5)-8
= -20-8
= - 28

B. f(x)=4
= 4x-8
=4.3 -8
= 12-8
= 4
maka f(x) = f(3)