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Nilai fungsii.f(x) = 1/2x-6.
f(a) = 26.
a.?
f(a) = 26.
f(x) = 1/2x-6.
26 = 1/2a-6.
26+6 = 1/2a.
1/2a = 32.
a = 32.2.
a = 64. (D).
cmiiw.