用简便方法计算3分之1加6分之1加12分之1加24分之1加48分之1加96分之1

2025-01-04 03:15:32
推荐回答(3个)
回答1:

等比数列求和,等比q=1/2,根据等比数列求和公式Sn=a1(1-q^n)/(1-q) ,n=6,a1=1/3,呢么sn=63/96.

回答2:

=96分之32+96分之16+96分之8+96分之4+96分之2+96分之1
=96分之63
=32分之21

回答3:

1/3+1/6+1/12+1/24+1/48+1/96
=1/3+1/6+1/12+1/24+1/48+1/96+1/96-1/96
=1/3+1/6+1/12+1/24+1/48+1/48-1/96
=1/3+1/6+1/12+1/24+1/24-1/96
=1/3+1/6+1/12+1/12-1/96
=1/3+1/6+1/6-1/96
=1/3+1/3-1/96
=2/3-1/96
=64/96-1/96
=63/96
=21/32