Các câu hỏi tương tự
Chứng minh rằng:
1/1×2 + 1/3×4 + 1/5×6 +.......+1/49×50=1/26 + 1/27 + 1/28 +.....+1/50
1/1*2+1/3*4+1/5*6+...+1/49*50=1/26+1/27+1/28+...+1/50
1/1*2+1/3*4+1/5*6+...+1/99*100
chung minh rang 1/1.2+1/3.4+1/5.6+....+1/49.50=1/26+1/27+1/28+....1/50
chứng minh
1/1*2+1/3*4+1/5*6+...+1/49*50=1/26+1/27+....+1/50
CMR: 1/26 + 1/27 + 1/28 + ... + 1/50 = 1 - 1/2 + 1/3 - 1/4 + ... + 1/49 - 1/50
gấpp ạaaa
Bài 1 Có hay không tồn tại 2 số dương a,b khác nhau sao cko: 1/a+1/b=1/(a+b)
Bài 2:CMR:1/(1*2)+1/(3*4)+1/(5*6)+...+1/(49*50)=1/26+1/27+1/28+...+1/50
cho a=1=1\2+1\3-1\4+1\5...+1\49-1\50.Chung to rang 7\12<4<5\6
chứng minh rằng:1/1*2+1/3*4+...+1/49*50=1/26+1/27+...+1/50
Chứng minh rằng: \(\dfrac{1}{1\cdot2}+\dfrac{1}{3\cdot4}+\dfrac{1}{5\cdot6}+...+\dfrac{1}{49\cdot50}=\dfrac{1}{26}+\dfrac{1}{27}+\dfrac{1}{28}+...+\dfrac{1}{50}\)
help mik với