\(A=\frac{3}{2\cdot5}+\frac{3}{5\cdot8}+\frac{3}{8\cdot11}+...+\frac{3}{92\cdot98}\)
\(A=\frac{1}{2}-\frac{1}{5}+\frac{1}{5}-\frac{1}{8}+\frac{1}{8}+...+\frac{1}{92}-\frac{1}{98}\)
\(A=\frac{1}{2}-\frac{1}{98}\)
\(A=\frac{47}{98}\)
TÍCH CHO MK NHA
B=3/2.5+3/5.8+3/8.11+3/11.14
kết quả của phép tính a =1/3(3/2.5+3/5.8+3/8.11+...+3/92.95+3/95,98)
3/2.5+3/5.8+3/8.11+....+3/...?
Tinh phan ...? biet rang khoang cach o giua la 10 so
Va cho biet qui luat(y la cong thuc) de tinh phan...?
va tinh tong
( 3/2.5 + 3/5.8 + 3/8.11 + .........+ 3/302.305 ) - 4x = 2/305
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
3.x/2.5+3.x/5.8+3.x/8.11+3.x/11.4=1/21
\(\dfrac{3}{2.5}\)+\(\dfrac{3}{5.8}\)+\(\dfrac{3}{8.11}\)\(\dfrac{3}{11.14}\)+\(\dfrac{3}{14.17}\)<\(\dfrac{1}{2}\)