y=sum(1/2^n) = 1/2 + 1/4 + 1/8 + ... = 1 y=sum(1/2^n) {n:0,2} = 1 + 1/2 + 1/4 = 1.75 y=sum(1/2^n) {n:2, } = 1/4 + 1/8 + 1/16 + ... = 0.5 y=sum(1/2^n) {n:1,,2} = 1/2 + 1/8 + 1/32 + ... = 0.6666... y=sum(1/2^n) {n:0,,2} = 1 + 1/4 + 1/16 + ... = 1.333...
h(x) = 0, for x < 0, 1/2 for x = 0, 1 for x > 0