Đề thi online - Một số phương pháp giải phương trì...

A \(\left( {0;0} \right);\,\,\left( {0; - 1} \right);\,\,\left( {1;2} \right);\,\,\left( {1; - 2} \right)\)

B \(\left( {0;0} \right);\,\,\left( {0;1} \right);\,\,\left( { - 1;2} \right);\,\,\left( { - 1; - 2} \right)\)

C \(\left( {0;0} \right);\,\,\left( {0;1} \right);\,\,\left( {1;2} \right);\,\,\left( {1; - 2} \right)\)

D \(\left( {0;0} \right);\,\,\left( {0; - 1} \right);\,\,\left( {1; - 2} \right);\,\,\left( { - 1;2} \right)\)

A \(\left( {x;y;z} \right) = \left( {4;5;3} \right)\)

B \(\left( {x;y;z} \right) = \left( {2;5;1} \right)\)

C \(\left( {x;y;z} \right) = \left( {4;7;1} \right)\)

D \(\left( {x;y;z} \right) = \left( {3;6;2} \right).\)

A \(\left( {4; - 2} \right);\,\,\left( { - 2;4} \right);\,\,\left( {0;2} \right);\,\,\left( {2;0} \right)\)

B \(\left( {4;2} \right);\,\,\left( {2;4} \right);\,\,\left( {0; - 1} \right);\,\,\left( { - 1;0} \right)\)

C \(\left( {2;1} \right);\,\,\left( {1;2} \right);\,\,\left( {0; - 1} \right);\,\,\left( { - 1;0} \right)\)

D \(\left( {4;2} \right);\,\,\left( {2;4} \right);\,\,\left( {0; - 2} \right);\,\,\left( { - 2;0} \right)\)

A \(\left( {1;3} \right);\,\,\left( {3;3} \right);\,\,\left( {3;1} \right)\)

B \(\left( {3;9} \right);\,\,\left( {3;3} \right);\,\,\left( {9;3} \right)\)

C \(\left( {3;9} \right);\,\,\left( {6;6} \right);\,\,\left( {9;3} \right)\)

D \(\left( {4;12} \right);\,\,\left( {6;6} \right);\,\,\left( {12;4} \right)\)

A \(\left( { - 2;3} \right);\,\,\left( {2;1} \right);\,\,\left( {5; - 1} \right);\,\,\left( {1; - 3} \right)\)

B \(\left( { - 2; - 3} \right);\,\,\left( {2;1} \right);\,\,\left( {5;1} \right);\,\,\left( {1; - 3} \right)\)

C \(\left( { - 2;3} \right);\,\,\left( {2; - 1} \right);\,\,\left( {5;1} \right);\,\,\left( {1; - 3} \right)\)

D \(\left( {2; - 3} \right);\,\,\left( {2;1} \right);\,\,\left( {5; - 1} \right);\,\,\left( {1; - 3} \right)\)

A \(\left( { - 3;2} \right);\,\,\left( {2; - 5} \right);\,\,\left( {6;1} \right);\,\,\left( { - 1; - 2} \right)\)

B \(\left( { - 3;2} \right);\,\,\left( {2;5} \right);\,\,\left( {6; - 1} \right);\,\,\left( { - 1; - 2} \right)\)

C \(\left( {2;\,3} \right);\,\,\left( {-5; \,2} \right);\,\,\left( {-1; \,6} \right);\,\,\left( { - 2; - 1} \right)\)

D \(\left( {3;2} \right);\,\,\left( {2; - 5} \right);\,\,\left( {6; - 1} \right);\,\,\left( { - 1; - 2} \right)\)

A \(n = 139\)

B \(n = 137\)

C \(n = 149\)

D \(n = 147\)

A \(\left( {5; - 2} \right);\,\,\left( {3;2} \right);\,\,\left( {5;2} \right);\,\,\left( {3; - 2} \right)\)

B \(\left( {5; - 2} \right);\,\,\left( { - 3;2} \right);\,\,\left( {5;2} \right);\,\,\left( { - 3; - 2} \right)\)

C \(\left( {5;2} \right);\,\,\left( {3;2} \right);\,\,\left( { - 5;2} \right);\,\,\left( { - 3;2} \right)\)

D \(\left( {5;2} \right);\,\,\left( {3;2} \right);\,\,\left( { - 5; - 2} \right);\,\,\left( { - 3; - 2} \right)\)

A \(\left( {7;43} \right);\,\,\left( {43;7} \right);\,\,\left( {5; - 31} \right);\,\,\left( { - 31;5} \right)\)

B \(\left( {7; - 43} \right);\,\,\left( { - 43;7} \right);\,\,\left( {5;31} \right);\,\,\left( {31;5} \right)\)

C \(\left( { - 7;43} \right);\,\,\left( {43; - 7} \right);\,\,\left( {5;31} \right);\,\,\left( {31;5} \right)\)

D \(\left( { - 7;43} \right);\,\,\left( {43; - 7} \right);\,\,\left( { - 5;31} \right);\,\,\left( {31; - 5} \right)\)