ƯCLN(104;130).
BCNN(104;130)
cho a=18;b=24;c=104 ,hỏi BCNN (a;b)gấp bao nhiêu lần ƯCLN
(Các bn giúp mk nha)
Cho a = 18 ;b=24 ;c=104 .Hỏi BCNN (a,b) gấp bao nhiêu lần ƯCLN(a,b,c)
Lam that nhanh ho phuong anh nha ma nho la dung lam tom tat lam theo tung buoc mot nhe mk se like
BCNN(18;24;104)=936
UCLN(18;24;104
vay BCNH gap UCLN :936:2 =468
ƯCLN(33,55)
ƯCLN(48,90)
ƯCLN(105,210)
ƯCLN(48,60,120)
ƯCLN(45,60)
ƯCLN(33,55)=11
ƯCLN(48,90)=6
ƯCLN(105,210)=105
ƯCLN(48,60,120)=12
ƯCLN(45,60)=15
\(ƯCLN(33,55)\)
\(33 = 3.11\)
\(55 = 5.11\)
\(ƯCLN(33,55) = 11\)
\(ƯCLN(105,210)\)
\(105 = 5.3.7\)
\(210 = 2.5.3.7\)
\(ƯCLN(105,210) = 5.3.7 = 105\)
\(ƯCLN(48,90)\)
\(48 = 2^4.3\)
\(90 = 2.5.3^2\)
\(ƯCLN(48,90) = 3.2 = 6\)
\(ƯCLN(48,60,120)\)
\(48 = 2^4.3\)
\(60 = 2^2.3.5\)
\(120 = 2^3.3.5\)
\(ƯCLN(48,60,120) = 2^2.3 = 4.3 = 12\)
\(ƯCLN(45,60)\)
\(45 = 3^2.5\)
\(60 = 2^2.3.5\)
\(ƯCLN(45,60) = 3.5 = 15\)
chứng minh: ƯCLN(k.a; k.b)=k.ƯCLN(a;b)
và chứng minh: ƯCLN( a;b;c)= ƯCLN( ƯCLN (a;b);c)= ƯCLN( ƯCLN (a;c);b)=ƯCLN( ƯCLN (b;c);a)
9 TÌM: ƯCLN ( 84 ; 105 ) ƯCLN ( 16 ; 24)
ƯCLN ( 40 ;144) ƯCLN (56; 140)
ƯCLN (52;42;48) ƯCLN (135 ;225;405)
ƯCLN (128;190 ;320)
GIUP MINH VOI DANG GAP
ƯCLN(84;105)=21
ƯCLN(16;24)=8
ƯCLN(40;144)=8
ƯCLN(52;42;48)=2
ƯCLN(135;225;405)=45
ƯCLN(128;190;320)=2
a: 84=2^2*3*7; 105=3*5*7
=>ƯCLN(84;105)=3*7=21
b: 16=2^4; 24=2^3*3
=>ƯCLN(16;24)=2^3=8
c: 40=2^3*5; 144=2^3*3^2
=>ƯCLN(40;144)=2^3=8
d: 56=2^3*7; 140=2^2*5*7
=>ƯCLN(56;140)=2^2*7=28
e: 52=2^2*13; 42=2*3*7; 48=2^4*3
=>ƯCLN(52;42;48)=2
f: 135=5*3^3; 225=5^2*3^2; 405=3^4*5
=>ƯCLN(135;225;405)=5*3^2=5*9=45
g: 128=2^7; 190=2*5*19; 320=2^6*5
=>ƯCLN(128;190;320)=2
104 * 104 * 104 = ?
104*104=10816,suy ra 104x104x104=10816*104=1124864,check nha
Đề bài: Tìm ƯCLN
a, ƯCLN ( 16, 24 )
b, ƯCLN ( 60, 90 )
c, ƯCLN ( 24, 84 )
d, ƯCLN ( 16, 60 )
e, ƯCLN ( 18, 77 )
g, ƯCLN ( 18, 90 )
h, ƯCLN ( 18, 30, 42 )
k, ƯCLN ( 26, 39, 48 )
a) ƯCLN ( 16, 24 )
16 = 23 24 = 22.3
ƯCLN ( 16;24 ) = 22= 4
b) ƯCLN ( 60, 90 )
60 = 22.3.5 90=2.32.5
ƯCLN ( 60;90 ) = 2.3.5 = 30
c) ƯCLN ( 24, 84 )
24 = 23.3 84 = 22.3.7
ƯCLN ( 24;84 ) = 22.3 = 12
d) ƯCLN ( 16, 60 )
16 = 24 60 = 22.3.5
ƯCLN ( 16;60 ) = 22=4
e) ƯCLN ( 18, 77 )
18 = 2.32 77=7.11
ƯCLN ( 18; 77 ) = 1
g) ƯCLN ( 18, 90 )
18 = 2.32 90=2.32.5
ƯCLN ( 18;90 ) = 2.32 = 18
h) ƯCLN ( 18, 30, 42 )
18 = 2.32 30 = 2.3.5 42 = 2.3.7
ƯCLN ( 18;30;42 ) = 2.3=6
k) ƯCLN ( 26, 39, 48 )
26 = 2.13 39 = 3.13 48 = 24.3
ƯCLN ( 26;39;48 ) = 1
a , ( x\(^2\)- 3x - 5 ) ⋮ ( x - 3 )
b , ( 5x + 2 ) ⋮ ( x + 1 )
c , ( 2x\(^2\)+ 3x + 2 ) ⋮ ( x + 1 )
a) \(x^2-3x-5=x\left(x-3\right)-5\)
Để \(^2-3x-5\)chia hết cho x-3 thì x(x-3) -5 phải chia hết cho x-3
mà x(x-3) chia hết cho x-3 => -5 phải chia hết cho x-3
=> x-3\(\inƯ\left(-5\right)=\left\{-1;-5;1;5\right\}\)
Lập bảng giải tiếp
\(5x+2=5\left(x+1\right)-3\)
Để 5x+2 chia hết cho x+1 thì 5(x+1)-3 phải chia hết cho x+1
mà 5(x+1) chia hết cho x+1
=> -3 phải chia hết cho x+1
=> x+1\(\inƯ\left(-3\right)=\left\{-3;-1;1;3\right\}\)
Lập bảng giải tiếp nhé! :3
Đề bài: Tìm ƯCLN
a, ƯCLN ( 18, 24 )
b, ƯCLN ( 24, 36 )
c, ƯCLN ( 16, 80, 176)
d, ƯCLN ( 6, 8, 18 )
e, ƯCLN ( 24, 80, 184 )
g, ƯCLN (56, 140 )
h, ƯCLN ( 12, 14, 8 ,20 )
k, ƯCLN ( 7, 9, 12, 21 )
a) ƯCLN ( 18, 24 )
18 = 2.33 24 = 23.3
ƯCLN ( 18;24 ) = 2.3 = 6
b) ƯCLN ( 24, 36 )
24 = 23.3 36 = 22.32
ƯCLN ( 24;36 ) = 22.3 = 12
c) ƯCLN ( 16, 80, 176)
16 = 24 80 = 24.5 176 = 24.11
ƯCLN ( 16;80;176 ) = 24 =16
d) ƯCLN ( 6, 8, 18 )
6 = 2.3 8 = 23 18 = 2.32
ƯCLN ( 6;8;18 ) = 2
e) ƯCLN ( 24, 80, 184 )
24 = 23.3 80 = 24.5 184 = 23.23
ƯCLN ( 24;80;184 ) = 23 = 8
g) ƯCLN (56, 140 )
56 = 23.7 140 = 22.5.7
ƯCLN ( 56;140 ) = 22.7 = 28
h) ƯCLN ( 12, 14, 8 ,20 )
12 = 22.3 14 = 2.7 8 = 23 20 = 22.5
ƯCLN ( 12;14;8;20 ) = 2
k)ƯCLN ( 7;9;12;21 )
7 = 7 9 = 32 12 = 22.3 21 = 3.7
ƯCLN ( 7;9;12;21 ) = 1
So sánh:
A=104^2015+2/104^2016+2
B=104^2016+2/104^2017+2