Toán a,1/5*6+1/6*7+….+1/24*25 b,2/1*3+2/3*5+…+2/99*101 01/07/2021 By Hadley a,1/5*6+1/6*7+….+1/24*25 b,2/1*3+2/3*5+…+2/99*101
Đáp án: Giải thích các bước giải: a) 1/5.6+1/6.7+….+1/24.25 =1/5-1/6+1/6-1/7+….+1/24-1/25 =1/5-1/25=5/25-1/25=4/25 b)2/1.3+2/3.5+….+2/99.101 =1/1-1/3+1/3-1/5+…..+1/99-1/101 =1/1-1/101 =101/101-1/101=100/101 Trả lời
Đáp án: a) 1/5.6+1/6.7+….+1/24.25 =1/5-1/6+1/6-1/7+….+1/24-1/25 =1/5-1/25=4/25 b)2/1.3+2/3.5+….+2/99.101 =1/1-1/3+1/3-1/5+…..+1/99-1/101 =1/1-1/101 =100/101 Trả lời
Đáp án:
Giải thích các bước giải:
a) 1/5.6+1/6.7+….+1/24.25
=1/5-1/6+1/6-1/7+….+1/24-1/25
=1/5-1/25=5/25-1/25=4/25
b)2/1.3+2/3.5+….+2/99.101
=1/1-1/3+1/3-1/5+…..+1/99-1/101
=1/1-1/101
=101/101-1/101=100/101
Đáp án:
a) 1/5.6+1/6.7+….+1/24.25
=1/5-1/6+1/6-1/7+….+1/24-1/25
=1/5-1/25=4/25
b)2/1.3+2/3.5+….+2/99.101
=1/1-1/3+1/3-1/5+…..+1/99-1/101
=1/1-1/101
=100/101