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b. 1
c. -4
d. x=1
e. a= -11
cara:
a. f(1)= 8/(5-1) = 8/4 = 2
b. f(-3)= 8/(5+3)= 8/8 = 1
c. f(7)= 8/(5-7)= 8/(-2)= -4
d. karena f(x) = 2, maka 2 = 8/(5-x)
8 = 10-2x
2x = 10-8
2x = 2
x = 1
e. karena f(a) = 0,5 atau 1/2, maka 1/2 = 8/(5-a)
2(8) = 1(5-a)
16 = 5-a
a = -11