= 4/3 . 5/4 . 6/5 . ..... 483/482 . 484/483
= 484 / 3
= 4/3 . 5/4 . 6/5 . ..... 483/482 . 484/483
= 484 / 3
làm nhanh giúp ạ
a) x- 45= 48- 68
b) 157- (x- 124)= -483
c) 6x+ 15= -9
d) (1- x). 5^4= 3. 5^5
cách giải bài : 1^15+1^35+1^63+1^99+...+1^399+1^483. tính b
Thực hiện phép tính :
a. ( -17 ) + 5 + ( -8 ) + 17
b. ( -9 ) + ( -11 ) + 21 + ( -1 )
c. 15 + 23 + ( -25 ) + ( -23 )
d. ( -3 ) + ( -350 ) + ( -7 ) + 350
e. ( -3 ) + ( -250 ) + ( -7 ) + 250
f. ( -4 ) + ( -440 ) + ( -6 ) + 440
g. 483 + ( -56 ) + 263 + ( -64 )
h. 215 + 43 + ( -215 ) + ( -25 )
1/Tính nhanh:
1) 45.(-24)+(-10).(-12)
2) (-134)+51.134+(-134).48
3) 124+(-52).124+(-124).(-47)
4) -55.78+13.(-78)-78.(-65)
Làm chi tiết hộ mik nha !
1. (1+1/2).(1+1/2^2).(1+1/2^3)....(1+1/2^100) < 3
2. 1/(5+1)+2/(5^2+1)+4/(5^4+1)+...+ 1024/(5^1024+1) <1/4
3. 3/(1!+2!+3!)+4/(2!+3!+4!)+...+100/(98!+99!+100!) <1/2
tính
a, 1/2-1/3+1/3-1/4+1/4-1/5
b, 1/3-1/5+1/5-1/7+1/7-1/0
c, 3/4-1/3-1/6
d, 1/2-1/3+1/4-1/6
a,1/3 .(x-2/5)=3/4 b, 7/3:(x-2/3)=4/5 c,1/3.(x-2/5)=4/5 d, 2/3.(x-1/2)-1/4.(x-2/5)=7/3 e,3/7 .(x-2/3)+1/2=5/4.(x-2) f,1/2.(x-3)+1/3.(x-4)+1/4.(x-5)=1/5 g,[2/3.(x-1/2)-4/5]:(x-1/3)=21/5 h, {x-[1/2.(x-3)+11/5]}:(x-1/2)=3/5 i,x.(x-2/5)-(x+2).x+11/4=4/3
1 và 3/4 x -5 =3 và 1/3
2/3 x +1/4 =7/12
1/3+2/5 ( x+1) =1
1/4 +1/3 : 3x = -5
1. a,23/27-(11/17-4/27) +(28/17) b,2/3 .7/9 +2/3 .2/9-2/9 c,7/3:5/11-1/3.11/5 d,(1+1/2) .(1+1/3) .(1+1/4).......(1+1/2023) e, (1-1/2).(1-1/3).....(1-1/2023) f,13/17.5/11-7/13.2/5+5/11.4/17-2/5.6/13 g, 1/2+1/3.1/4-1/5:1/6 2,so sánh n+2/n+3 và n+1/n+2 ( n là số tự nhiên)