De thi hsg toan 9 cap huyen

De thi HSG lop 9 cap huyen/TP

... They can (9) ………… to the songs of birds while working This contact with nature is (10) ………… for strong health (1) IV/ Use suggested words and phrases to complete the letter below (5 marks) Dear Mai, ... environment clean is very important It’s ………………………………………………………………… He was delighted to receive his aunt’s letter He was delighted that his ………………………………………… They will show the time machine to the ... enjoys some advantages that people in the city cannot enjoy The country has …………… for people to things They have space to plant flowers and space to (2) ………… animals It’s easy for them to get...

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Đề thi HSG Toán 6 cấp Huyện - Rất hay

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De thi HSG toan 9 cap tinh 2010

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Đề thi hsg toán 9 cấp thành phố

... x 199 9 ; x 299 9 ; x 399 9 ; x 499 9 ( x11000.x 199 9 + x21000.x 299 9 +x31000 x 399 9 +x41000.x 499 9 )2 ( x12000 + x22000 + x32000 + x42000)( x1 199 8+ x2 199 8 + x 199 8 + x 199 8) ( x1 199 9 + x2 199 9 + x3 199 9 + ... nên ta có : ( x1 199 9 + x2 199 9 + x3 199 9 + x4 199 9)2 = ( x12000 + x22000 + x32000 + x42000)( x1 199 8+ x2 199 8 + x 199 8 + x 199 8) 1000 1000 x1 x1000 x3 x1000 Suy 99 9 = 99 9 = 99 9 = 499 9 Hay x1 = x2 = x3 ... x2 199 9 + x3 199 9 + x4 199 9)2 ( x12000 + x22000 + x32000 + x42000)( x1 199 8+ x2 199 8 + x 199 8 + x 199 8) + Mà theo ta có : x1 199 8 + x 199 8 + x3 199 8 + x 199 8 = 4 199 9 199 9 199 9 199 9 x1 + x2 + x3 + x4...

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