第n个矩形的面积为 sn .
sn = 1/2^(2n-2)
第二个矩形,即 n = 2 时,
s2 = 1 / 2^(4-2)
= 1 / 2^2
= 1 / 4
再如,
第三个矩形,n = 3 时,
s3 = 1 / 2^(6-2)
= 1 / 2^4
= 1 / 16
等等.
第n个矩形的面积为 sn .
sn = 1/2^(2n-2)
第二个矩形,即 n = 2 时,
s2 = 1 / 2^(4-2)
= 1 / 2^2
= 1 / 4
再如,
第三个矩形,n = 3 时,
s3 = 1 / 2^(6-2)
= 1 / 2^4
= 1 / 16
等等.