Các câu hỏi tương tự
Tìm x biết :
4/x=8/6
3/x-5=-4/x+2
X/-2=-8/x
Rút gọn các phân số
2^4.5^2.11^2.7/2^3.5^3.7^2.11
2^10.3^10-2^10.3^9/2^9.3^10
5^11.7^12+5^12.7^11/5^12.7^12+9.5^11.7^11
2^x+3.5^y=20^x
Tìm x, biết:
a) (x - 3.5).12 = 0;
b) 35. (x-10) = 35;
c) ( x -5): 3 + 3 = 24;
d) ( x- 4) : 3 - 2 = 100.
2^x+3.5^y=20^x
c, C = 2020/1.2 + 2020/2.3 + 2020/3.4 + ... + 2020/2019.2020
d, D = 2020/1.3 + 2020/3.5 + 2020/5.7 + ... + 2020/2019.2021
e, E = 2023/ 1.3 + 2023/3.5 + 2023/5.7 + ... + 2023/2019.2020
f, F = 1/15 + 1/35 + 1/63 + ... + 1/657
giúp với mình cần gấp lắm
3^3.5^3-20.{300-[540-2^3.(7^8:7^6.7^0)]}
MM
6 tháng 12 2021 lúc 19:17
.Thực hiện phép tínha) 47 – [(45.24 – 5 2 .12):14]b) 50 – [(20 – 2 3 ) : 2 + 34]c) 102 – [60 : (56 : 54 – 3.5)]d) 50 – [(50 – 2 3 .5):2 + 3]e) 10 – [(82 – 48).5 + (23 .10 + 8)] : 28f) 8697 – [37 : 35 + 2(13 – 3)]g) 2011 + 5[300 – (17 – 7)2 ]h) 695 – [200 + (11 – 1)2 ]k) 2345 – 1000 : [19 – 2(21 – 18)2 ]l) 128 – [68 + 8(37 – 35)2 ] : 4m) 568 – {5[143 – (4 – 1)2 ] + 10} : 10n) 107 – {38 + [7.32 – 24 : 6+(9 – 7)3 ]}:15o) 307 – [(180 – 160) : 22 + 9] : 2p) 205 – [1200 – (42 – 2.3)3 ] : 40q) 177 :[2....
Đọc tiếp
.Thực hiện phép tính
a) 47 – [(45.24 – 5 2 .12):14]
b) 50 – [(20 – 2 3 ) : 2 + 34]
c) 102 – [60 : (56 : 54 – 3.5)]
d) 50 – [(50 – 2 3 .5):2 + 3]
e) 10 – [(82 – 48).5 + (23 .10 + 8)] : 28
f) 8697 – [37 : 35 + 2(13 – 3)]
g) 2011 + 5[300 – (17 – 7)2 ]
h) 695 – [200 + (11 – 1)2 ]
k) 2345 – 1000 : [19 – 2(21 – 18)2 ]
l) 128 – [68 + 8(37 – 35)2 ] : 4
m) 568 – {5[143 – (4 – 1)2 ] + 10} : 10
n) 107 – {38 + [7.32 – 24 : 6+(9 – 7)3 ]}:15
o) 307 – [(180 – 160) : 22 + 9] : 2
p) 205 – [1200 – (42 – 2.3)3 ] : 40
q) 177 :[2.(42 – 9) + 32 (15 – 10)]
r) [(25 – 2 2 .3) + (32 .4 + 16)]: 5
i) 129 – 5[29 – (6 – 1)2 ]
j) 2010 – 2000 : [486 – 2(72 – 6)]
s) 125(28 + 72) – 25(32 .4 + 64)
t) 500 – {5[409 – (23 .3 – 21)2 ] + 103 } : 15
1/1.3+1/3.5+1/5.7+....+1/n(n+2)=20/41
1/3.5+1/5.7+...+1/x.(x+2)=20/41 tìm x hộ mình với