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Diketahui f(x)=(x + a) + 3 dan f(2)=7. Tentukana. bentuk fungsi f(x)
b. nilai f(-1)
c. nilai f(-2) + f(-1)
d. bentuk fungsi f(2x - 5)
f(x)=(x + a) + 3
f(2)=7
(2 + a) + 3 =7
5+a =7
a = 7-5=2
A. f(x)=(x + a) + 3
= (x + 2) + 3
=(x + 5)
B. f(-1) = -1+ 5
=4
C. f(-2) + f(-1)
= (-2 + 5)+(-1+ 5)
= 3 +4
=7
D. f(2x - 5)
=( 2x-5) + 5
=2x