Hệ Phương Trình

$\left\{ \begin{array}{l} \sqrt{xy + (x - y)(\sqrt{xy}-2)} +\sqrt{x} = y+\sqrt{y}\\ (x+1)(y+\sqrt{xy} +x-x^{2})=4\end{array} \right.$

Hệ phương trình bậc nhất...

Hệ Phương Trình

$\left\{ \begin{array}{l} \sqrt{xy + (x - y)(\sqrt{xy}-2)} +\sqrt{x} = y+\sqrt{y}\\ (x+1)(y+\sqrt{xy} +x-x^{2})=4\end{array} \right.$

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Nếu ta lập được 1 tổ thì tổ thứ 2 thỏa mãn điều kiện đề bàiXét tổ có 1 học sinh giỏi,số cách chọn học sinh giỏi là 3" role="presentation" style="display: inline-block; line-height: 0; font-size: 22.5px; word-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; padding-top: 1px; padding-bottom: 1px; position: relative;">33TH1: có 2" role="presentation" style="display: inline-block; line-height: 0; font-size: 22.5px; word-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; padding-top: 1px; padding-bottom: 1px; position: relative;">22 học sinh khá,số cách chọn hs khá là C52⇒" role="presentation" style="display: inline-block; line-height: 0; font-size: 22.5px; word-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; padding-top: 1px; padding-bottom: 1px; position: relative;">C25⇒C52⇒ số cách chọn hs TB là C85⇒" role="presentation" style="display: inline-block; line-height: 0; font-size: 22.5px; word-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; padding-top: 1px; padding-bottom: 1px; position: relative;">C58⇒C85⇒ có : 3.C52.C85=1680" role="presentation" style="display: inline-block; line-height: 0; font-size: 22.5px; word-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; padding-top: 1px; padding-bottom: 1px; position: relative;">3.C25.C58=16803.C52.C85=1680 cách chọnTH2: có 3" role="presentation" style="display: inline-block; line-height: 0; font-size: 22.5px; word-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; padding-top: 1px; padding-bottom: 1px; position: relative;">33 học sinh khá ,số cách chọn hs khá là C53⇒" role="presentation" style="display: inline-block; line-height: 0; font-size: 22.5px; word-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; padding-top: 1px; padding-bottom: 1px; position: relative;">C35⇒C53⇒ só cách chọn hs TB là C84⇒" role="presentation" style="display: inline-block; line-height: 0; font-size: 22.5px; word-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; padding-top: 1px; padding-bottom: 1px; position: relative;">C48⇒C84⇒ có3.C53.C84=2100" role="presentation" style="display: inline-block; line-height: 0; font-size: 22.5px; word-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; padding-top: 1px; padding-bottom: 1px; position: relative;">3.C35.C48=21003.C53.C84=2100 cách chọn⇒" role="presentation" style="display: inline-block; line-height: 0; font-size: 22.5px; word-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; padding-top: 1px; padding-bottom: 1px; position: relative;">⇒⇒ có tất cả :3780" role="presentation" style="display: inline-block; line-height: 0; font-size: 22.5px; word-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; padding-top: 1px; padding-bottom: 1px; position: relative;">37803780 cách chọn.

Xét tổ có 1 học sinh giỏi,số cách chọn học sinh giỏi là 3" role="presentation" style="padding-top: 1px; padding-bottom: 1px; font-size: 22.5px; display: inline-block; line-height: 0; word-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;">33TH1: có 2" role="presentation" style="padding-top: 1px; padding-bottom: 1px; font-size: 22.5px; display: inline-block; line-height: 0; word-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;">22 học sinh khá,số cách chọn hs khá là C52⇒" role="presentation" style="padding-top: 1px; padding-bottom: 1px; font-size: 22.5px; display: inline-block; line-height: 0; word-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;">C25⇒C52⇒ số cách chọn hs TB là C85⇒" role="presentation" style="padding-top: 1px; padding-bottom: 1px; font-size: 22.5px; display: inline-block; line-height: 0; word-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;">C58⇒C85⇒ có : 3.C52.C85=1680" role="presentation" style="padding-top: 1px; padding-bottom: 1px; font-size: 22.5px; display: inline-block; line-height: 0; word-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;">3.C25.C58=16803.C52.C85=1680 cách chọnTH2: có 3" role="presentation" style="padding-top: 1px; padding-bottom: 1px; font-size: 22.5px; display: inline-block; line-height: 0; word-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;">33 học sinh khá ,số cách chọn hs khá là C53⇒" role="presentation" style="padding-top: 1px; padding-bottom: 1px; font-size: 22.5px; display: inline-block; line-height: 0; word-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;">C35⇒C53⇒ số cách chọn hs TB là C84⇒" role="presentation" style="padding-top: 1px; padding-bottom: 1px; font-size: 22.5px; display: inline-block; line-height: 0; word-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;">C48⇒C84⇒ có3.C53.C84=2100" role="presentation" style="padding-top: 1px; padding-bottom: 1px; font-size: 22.5px; display: inline-block; line-height: 0; word-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;">3.C35.C48=21003.C53.C84=2100 cách chọn⇒" role="presentation" style="padding-top: 1px; padding-bottom: 1px; font-size: 22.5px; display: inline-block; line-height: 0; word-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;">⇒⇒ có tất cả :3780" role="presentation" style="padding-top: 1px; padding-bottom: 1px; font-size: 22.5px; display: inline-block; line-height: 0; word-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;">37803780 cách chọn.