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fog= 2(3x+5)-1
fog= 6x+10-1
fog= 6x+9 tingal invera aja
b. cari gof
gof = 3x+5 f(x)
gof= 3(2x-1) +5
gof= 6x-3+5
gof = 6x+2 tinggal invers aja beres
hehehe