Các câu hỏi tương tự
chung minh rang :
1/2 + 1/3 +1/4 + 1/5 + 1/6 + 1/7 + 1/8 +1/9 > 8/9
jup minh nha a hi hi
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+.........................50= ?
1/10×11+1/11×12+1/12×13+...1/49×50
chung minh rang fx chia het cho gx voi fx x 99 x 88 x 77 ... x 11 1và g x x 9 x 8 ... x 1
so sánh
a)1/2+1/6+1/12+1/20+1/30+1/42 với 60006/70707
b)1/11+1/12+1/13+1/14+.....+1/19+1/20 với 1
c)7/9+8+13 với 8/9+7/13
d)5/6+6/7+7/8+8/5 với 4
1 200-18 :(372:3 *x-1)-28=166
(7*13+8*13):(9va2/3-x)=39
x=(6va3/5:s6-0,125 *8+2va2/15*0,03)*11/4
(100-99+98-97+96-95+....+4-3+2-1):50 +2010-12*x=91
2 A= 1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256+1/512+1/1024
B=27.45+27.55/2+4+...+16+18
4 tháng 4 2023 lúc 19:01
Tính nhanh
a) 31/23 - (7/32 + 8/23)
b) 38/45 - (8/45 - 17/51 - 3/11)
c)(1/3 + 12/67 + 13/41) - ( 79/67 - 28/41)
d) 1/5 + -1/6 + 1/7 + -1/8 + 1/9 + 1/8 + -1/7 + 1/6 + -1/5
Tim mot so bt rang so do chia het cho 8 du 5, chia 12 du 1 hai thuong hon kem nhau 13 don vi
1+2+3+4+5+6+7+8+9+10+11+12+13+141+5