Các câu hỏi tương tự
a) (4^17+4^3) : (4^16+4^2)
b) (2^7. 3^4.2^9.3^5) : ( 2^6.3^3.13)
b) (2^7. 3^4+2^9.3^5) : ( 2^6.3^3.13)
- Nhanh nào
1.Thực hiện phép tính:
a)24^3:3^4-32^12:16^12
b) (2^31+2^27):(2^14x2^13)
c)(2^43+2^4):(2^39+1)
d)(2^23+2^24+2^25):(2^18+2^19+2^20)
e)(3^6x5^7x7^11):(3^4x5^7x7^10)
f)(2^7x3^4+2^9x3^5):(2^6x3^3x13)
g)(3^12+3^13):3^10
h)(4^17+4^3):(4^16+4^2)
a)(2^7.3^4+2^9.3^5):(2^6.3^3.13)
b) 2-1
Tính:
a) -5/7(14/5 - 7/10) : |-2/3| - 3/4(8/9 + 16/3) + 10/3(1/3 + 1/5)
b) 17/-26(1/6 - 5/3) : 17/13 - 20/3(2/5 - 1/4) + 2/3(6/5 - 9/2)
c) -8/9(9/8 - 3/2) + 5/4 : (5/2 - 15/4) - 3/4(10/9 - 8/3) : (-1/3)
d) 21/10 : (12/5 - 9/10) . (-4/7) - 3/2(1/6 - 7/12) + 1/5(3/2 - 1/4)
1. Tìm a,b,c biết:a) a/b 8/5; b/c 2/7 và a+b+c 61b) ab 1/2; bc 2/3; ac 3/4c) 3a2b; 5b 7c và 3a + 5c - 7b 602. tìm các số nguyên n sao cho:1) 5^n + 5^n+2 6502) 32^-n .16^n 10243) 3^-1 .3^n+ 5. 3^n-1 1624) 125. 5ge5^nge5 . 255) (n^54)^2 n6) 243ge3^nge9.277) 2^n+3 . 2^n 1448)33^nle2349) 8. 16ge2^nge410) 4^15. 9^152^n.3^n 18^16. 2^1611) 4^11. 25^11le2^n. 5^nle20^12. 5^1212)frac{4^5+4^5+4^5+4^5}{3^5+3^5+3^5}.frac{6^5+6^5+6^5+6^5+6^5+6^5}{2^5+2^5} 2^n13) 9. 27^n 3^514) (2^3 : 4) . 2^n 415)...
Đọc tiếp
1. Tìm a,b,c biết:
a) a/b = 8/5; b/c = 2/7 và a+b+c= 61
b) ab = 1/2; bc= 2/3; ac = 3/4
c) 3a=2b; 5b = 7c và 3a + 5c - 7b= 60
2. tìm các số nguyên n sao cho:
1) 5^n + 5^n+2 = 650
2) 32^-n .16^n = 1024
3) 3^-1 .3^n+ 5. 3^n-1 = 162
4) 125. 5\(\ge\)5^n\(\ge\)5 . 25
5) (n^54)^2 = n
6) 243\(\ge\)3^n\(\ge\)9.27
7) 2^n+3 . 2^n = 144
8)3<3^n\(\le\)234
9) 8. 16\(\ge\)2^n\(\ge\)4
10) 4^15. 9^15<2^n.3^n< 18^16. 2^16
11) 4^11. 25^11\(\le\)2^n. 5^n\(\le\)20^12. 5^12
12)\(\frac{4^5+4^5+4^5+4^5}{3^5+3^5+3^5}\).\(\frac{6^5+6^5+6^5+6^5+6^5+6^5}{2^5+2^5}\)= 2^n
13) 9. 27^n= 3^5
14) (2^3 : 4) . 2^n= 4
15) 3^-2 . 3^4. 3^n = 3^7
16)2^-1. 2^n +4.2^n=9.2^5
Cho bốn số a;b;c;d thỏa mãn a : b = 2 :3 ; b : c = 4: 5 ; c : d = 6 : 7
Khi đó a : b : c : d bằng:
A. 16 ; 24 ; 30 ; 35
B. 4 ; 12 ; 6 ;7
C.8 ;12 ; 15 ; 13
D. 16 ; 24 ; 32 ; 35
Mình cần gấp nha các bạn. :o......
B1: Tính
a) (1/4)44. (1/2)12
b) \(\frac{3^{17}.81^{11}}{27^{10}.9^{15}}
\)
c)\(\frac{14^{16}.21^{32}.35^{48}}{10^{16}.15^{32}.7^{96}}\)
d)\(\frac{\left(5^4-5^3\right)^3}{125^4}\)
e)\(\frac{10^3+5.10^2+5^3}{6^3+3.6^2+3^3}\)
22 tháng 8 2023 lúc 18:37
mọi người ơi pls help me
1) -10/11 . 8/9 + 7/18 . 10/11 2) 12/25 . 23/7 - 12/7 . 13/25 3) 3/7 . 16/15 - 2/15 . -3/7 4) -4/13 . 5/17 + -12/13 . 4/17