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\(A=\left\{36;48;60;72\right\}\)
\(B=\left\{0;15;30;45;60;75;90\right\}\)
\(C=\left\{12;18\right\}\)
\(D=\left\{1;3;9\right\}\)
A={36;48;60;72}
B={0;15;30;45;60;75;90}
C= {18;12}
D={1;3;9}
hok tốt nha!!
a) Ta có: Ư(40) = {1;2;4;5;8;10;20;40}
Do đó: A = {8; 10; 20; 40}
b) Ta có: B(12) = {0;12;24;36;48;60;72;...}
Do đó: B = {24; 36; 48; 60}
Bài 40:
a) A = \(\left\{11;12;13;14;15\right\}\)
b) B = \(\left\{1;2;3;4;5;6\right\}\)
c) C = \(\left\{12;13;14;15;16;17;18;19\right\}\)
d) D = \(\left\{1;2;3;4;5;6;7;8;9;10\right\}\)
Câu 41:
a) A = \(\left\{0;1;2;3;4;5\right\}\)
b) B = \(\left\{1;2;3;4;5\right\}\)
c) C = \(\left\{0;1;2;3;4;5;6;7\right\}\)
d) D = \(\left\{205;206;207;208\right\}\)
e) E = \(\left\{1200;1201;1202;1203;1204;1205\right\}\)
g) G = \(\left\{250;251;252;253;254\right\}\)
Bài 42:
a) A = \(\left\{0;1;2;3;4;5;6;7\right\}\)
b) B = \(\left\{10;11;12;13;14\right\}\)
c) C = \(\left\{0;1;2;3;4;5;6\right\}\)
d) D = \(\left\{8;9;10;11;12;13\right\}\)
e) E = \(\left\{1;2;3;4\right\}\)
f) F = \(\left\{1;2;3;4;5;6;7\right\}\)
g) G = \(\left\{17;18;19;20;21\right\}\)
h) H = \(\left\{8;9;10;11;12;13\right\}\)
Bài 43: ( bạn không viết rõ đề bài nên mình viết 2 cách ra nhé )
a) A = \(\left\{0;1;2;3;4;5;...;2298;2299;2300\right\}\)
A = \(\left\{x\in N|x\le2300\right\}\)
b) B = \(\varnothing\) ( B thuộc tập hợp rỗng )
B = \(\left\{x\in N|14< x< 15\right\}\)
c) C = \(\left\{0;1;2;3;4\right\}\)
C = \(\left\{x\in N|x\le4\right\}\)
d) D = \(\left\{1;2;3;4;5;6;...;143;144\right\}\)
D = \(\left\{x\inℕ^∗|x< 145\right\}\)
e) E = \(\left\{7;8;9;10;11;12\right\}\)
E = \(\left\{x\in N|6< x\le12\right\}\)
g) G = \(\left\{1226;1228;1230;1232;1234\right\}\)
G = \(\left\{x\in N\right\}chẵn|1225< x\le1234\)
Bài 44:
a) A = \(\left\{0;1;2;3;4;5;...;49;50\right\}\)
A = \(\left\{x\in N|x\le50\right\}\)
b) B = \(\varnothing\) ( B thuộc tập hợp rỗng )
B = \(\left\{x\in N|8< x< 9\right\}\)
c) C = \(\left\{0;1;2;3;4;5;6\right\}\)
C = \(\left\{x\in N|x\le6\right\}\)
d) D = \(\left\{1;2;3;4\right\}\)
D = \(\left\{x\inℕ^∗|x< 5\right\}\)
e) E = \(\left\{8;9;10;11;12;13;14\right\}\)
E = \(\left\{x\in N|7< x\le14\right\}\)
Bài 45:
a) B = \(\left\{0;1;2;3;4;5\right\}\)
B = \(\left\{x\in N|x\le5\right\}\)
b) thuộc tập hợp B thì:
\(5\in B\)
\(4\in B\)
\(0\in B\)
\(6\notin B\)
\(1\in B\)
\(\dfrac{1}{2}\notin B\)
Chúc bạn học tốt
a) M = {10; 11; 12; 13; 14}
b) K = {1; 2; 3}
c) L = {0; 1; 2; 3}
a) \(M=\left\{10;11;12;13;14\right\}\)
b) \(K=\left\{1;2;3\right\}\)
c) \(L=\left\{0;1;2;3\right\}\)
A={0,1,2,3,4,5,6,7,8,9,..,14}
B={10,11,12,....,18}
C={0,2,4,6,8,..,20}
A = { 1; 2; 3; 4; 5; 6; 7; 8; 9; 10; 11; 12; 13; 14 }
B = { 10; 11; 12; 13; 14; 15; 16; 17; 18 }
C = { 2; 4; 6; 8; 10; 12; 14; 16; 18; 20 }
A= {0; 1; 2; 3; 4; 5; 6; 7 } A có 8 phần tử
B= {0; 1; 2; 3; 4; 5; 6 } B có 7 phần tử
C= \(\varnothing\) C có 0 phần tử
a) A = { -2;-1;0;1 }
b) B = { -4;0;4;8;12;16;20 }
c) C = { 1;2;3;4;5;6;10;12;15 }
d) D = { 1;2;3;4;6;12 }
a: \(x\in B\left(5\right)\)
=>\(x\in\left\{0;5;10;15;20;25;30;35;40;...\right\}\)
mà 20<=x<=36
nên \(x\in\left\{20;25;30;35\right\}\)
b: \(x\inƯ\left(20\right)\)
=>\(x\in\left\{1;2;4;5;10;20\right\}\)
mà x>8
nên \(x\in\left\{10;20\right\}\)
\(A=\left\{36;48;60;72\right\}\)
\(B=\left\{0;15;30;45;60;75;90\right\}\)
\(C=\left\{12;18\right\}\)
\(D=\left\{1;3;9\right\}\)//nếu x là số tự nhiên
hoặc \(D=\left\{\pm1;\pm3;\pm9\right\}\)//nếu x là số nguyên