Các câu hỏi tương tự
tinh tong
A=2/2.5+2/5.8+2/8.11+.....+2/302.305
1/2.5 - 1/5.8 -1/8.11 - ...- 1/302.305
B=3/2.5+3/5.8+3/8.11+3/11.14
\(\dfrac{3}{2.5}\)+\(\dfrac{3}{5.8}\)+\(\dfrac{3}{8.11}\)\(\dfrac{3}{11.14}\)+\(\dfrac{3}{14.17}\)<\(\dfrac{1}{2}\)
3/ 2.5 + 3/ 5.8 + 3/ 8.11+ ...+ 3/ 92.95
giúp mị với !!!!!!!!!!!!!!
Tính nhanh :
P= 3/2.5 +3/5.8 +3/8.11 +....+3/17.20
tinh tong :
T=3/2.5+3/5.8+3/8.11+...+3/299.302
tính S=23/2.5+23/5.8+23/8.11+...+23/53.56 = ?
3.x/2.5+3.x/5.8+3.x/8.11+3.x/11.4=1/21