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jadi tinggal masukin aja x nya ke : f (x) = 5x - 2
jadi :
f (-2) = 5 (-2) -2 = -10 -2 = -12
f (-1) = 5 (-1) -2 = -5 -2 = -7
f (0) = 5 (0) -2 = 0 -2 = -2
f (1) = 5 (1) -2 = 5 -2 = 3
f (2) = 5 (2) -2 = 10 -2 = 8
jadi daerah hasilnya yaitu : {-12,-7,-2,3,8} (a)