Question

Diketahui grafik fungsi f(x)=k. melalui titik (2,20) nilai f(1)

Answer 1

f(x)=k.
melalui titik (2,20) ==> f(2)=20
                                 k. = 20
                                 k. 4 = 20
                                 k  = 5

f(x)=5.
f(1)=5. = 5. = 5.1/8 = 5/8

Answer 2

F(2)=20

maka cari nilai k
20 = k . 2^(5.2-8)
20 = k . 2^2
20 = k.4
k = 5

f(x)=5.2^(5x-8)
f(1) = 5.2^(5-8)
f(1) = 5.2^(-3) = 0.625