Fungsi f ditentukan dgn rumus f(x) = 5+1/2x. Jika f(a)=3,maka nilai a=

f(x) = 5 + 1/2x
f(a) = 3
f(a) = 5 + 1/2a = 3
1/2a = 3 - 5
1/2a = -2
a = -2 × 2/1
a = -4
jadi nilai a = -4

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