Fungsi f:x = (x-1/2)(x-3/5), jika m=f(1), nilai dari 20m adalah

F(1) = (1-½)(1-³/5) = 1/2 x 2/5 = 2/10
m = 2/10 m
20m = 20.2 / 10 = 2.2 = 4