Tìm BCNN rồi tìm BC của 84 và 180
K
Khách
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
Những câu hỏi liên quan
R
1
DT
28 tháng 11 2021
a ) BCNN (24,80) : 240.
BC (24,80) : 480,720,960,...
BCNN (41,58):2378.
BC(41,58):4756,7134,...
BCNN (90,99,84):13860
BC(90,99,84):27720,41580,...
và 
và x < 500 b) 
và 
QM
31 tháng 3 2020
a)
Ư(5) = {1; -1; 5; -5}
Ư(10) = {1; -1; 2; -2; 5; -5; 10; -10}
Ư(15) = {1; -1; 3; -3; 5; -5; 15; -15}
ƯC(5; 10; 15) = {1; -1; 5; -5}
B(5) = {0; 5; -5; 10; -10...}
B(10) = {0; 10; -10; 20; -20...}
B(15) = {0; 15; -15; 30; -30...}
BC(5; 10) = {0; 10; -10; 20; -20...}
b)
120; 180
120 = \(2^3\). 3 . 5
180 = \(2^2\). \(3^2\). 5
\(\Rightarrow\)ƯCLN(120; 180) = \(2^2\). 3 . 5 = 4 . 3 . 5 = 60
\(\Rightarrow\)ƯC(120; 180) = Ư(60) = {1; -1; 2; -2; 3; -3; 4; -4; 5; -5; 6; -6; 10; -10; 20; -20; 30; -30; 60; -60}
c)
20; 50
20 = \(2^2\). 5
50 = 2 . \(5^2\)
\(\Rightarrow\)BCNN(20; 50) = \(2^2\). \(5^2\)= 4 . 25 = 100
\(\Rightarrow\)BC(20; 50) = B(100) = {0; 100; -100; 200; -200...}
ok nhé!
HT
20 tháng 11 2017
\(60=2.2.3.5\)
\(180=2.2.3.3.5\)
\(\Rightarrow BCNN\left(60,180\right)=2^2.3^2.5=180\)
LC
20 tháng 11 2017
ggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn
20 tháng 10 2023
a: \(42=2\cdot3\cdot7;70=2\cdot5\cdot7\)
=>\(BCNN\left(42;70\right)=2\cdot3\cdot5\cdot7=210\)
=>\(BC\left(42;70\right)=B\left(210\right)=\left\{0;210;420;...\right\}\)
b: \(70=2\cdot5\cdot7;180=3^2\cdot5\cdot2^2\)
=>\(BCNN\left(70;180\right)=2^2\cdot3^2\cdot5\cdot7=1260\)
=>\(BC\left(70;180\right)=\left\{1260;2520;...\right\}\)
c: \(5=5;7=7;8=2^3\)
=>\(BCNN\left(5;7;8\right)=5\cdot7\cdot8=280\)
=>\(BC\left(5;7;8\right)=\left\{280;560;...\right\}\)
d: \(12=2^2\cdot3;18=3^2\cdot2\)
=>\(BCNN\left(12;18\right)=2^2\cdot3^2=36\)
=>\(BC\left(12;18\right)=\left\{36;72;...\right\}\)
e: \(15=3\cdot5;18=3^2\cdot2\)
=>\(BCNN\left(15;18\right)=3^2\cdot2\cdot5=90\)
=>\(BC\left(15;18\right)=\left\{90;180;...\right\}\)
f: \(84=2^2\cdot3\cdot7;108=3^3\cdot2^2\)
=>\(BCNN\left(84;108\right)=2^2\cdot3^3\cdot7=756\)
=>\(BC\left(84;108\right)=\left\{756;1512;...\right\}\)
j: \(33=3\cdot11;44=2^2\cdot11;55=5\cdot11\)
=>\(BCNN\left(33;44;55\right)=3\cdot2^2\cdot5\cdot11=660\)
=>\(BC\left(33;44;55\right)=\left\{660;1320;...\right\}\)
g: \(1=1;12=2^2\cdot3;27=3^3\)
=>\(BCNN\left(1;12;27\right)=1\cdot2^2\cdot3^3=108\)
=>\(BC\left(1;12;27\right)=\left\{108;216;...\right\}\)
n: \(5=5;9=3^2;11=11\)
=>\(BCNN\left(5;9;11\right)=5\cdot3^2\cdot11=495\)
=>\(BC\left(5;9;11\right)=\left\{495;990;...\right\}\)
PL
6 tháng 11 2018
320 = 26 . 5
180 = 22 . 32 . 5
=> \(ƯCLN\left(320;180\right)=2^2.5=20\)
\(\Rightarrow BCNN\left(320;180\right)=2^6.3^2.5=2880\)
\(\RightarrowƯC\left(320;180\right)=\left\{2;5\right\}\)
\(\Rightarrow BC\left(320;180\right)=\left\{0;2880;5760;8640;...\right\}\)
6 tháng 11 2018
320 = 26. 5 320 = 26. 5
180 = 22. 32. 5 180 = 22. 32. 5
ƯCLN(320;180) = 22. 5 = 20 BCNN(320;180) = 26. 32. 5 = 2560
ƯC(320;180) = ( 1;2;4;5;10;20 ) BC(320;180) =( 0;2560;5120;... )
84=2^2.3.7
180=2^2.3^2.5
=>BCNN(84;180)=2^2.3^2.5.7=1260
=>BC(84;180)=B(1260)={0;1260;2520;3780;..}
là 756 nhaduy vu