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phann92895
2 năm trước
Chứng minh : 2x^2 - 5y^2 = 7 không có nghiệm nguyên
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Các câu hỏi liên quan

1) ------- washed the dishes? -Dorothy. ------- did she go to bed? -At ten o’clock. 2) ------- many children were there in the pool? –Three. ------- were they doing? –They were swimming. 3) ------- is Laura doing? -She is having a bath. ------- is she having the bath? -In the bath tub. 4) ------- is picking the apples? -Aimee. ------- is she picking up them alone? -Because there is nobody to help her. 5) ------- is Kim going? –to the yarn shop. ------- shop is she going? – The shop near the market. 6) ------- does Jane look like? –Great. ------- is she so chic? –She is going to a party. 7) ------- guitar is yours. –The blue one. ------- often do you play it? –Everyday. 8) ------- is cooking in the kitchen? –Marry. ------- is she cooking? – Meat. 9) ------- is Ann going? – School. ------- is she so late? – She missed the school bus. 10) ------- are they doing? –Getting ready for the tournament. ------- is the tournament? – Tomorrow. 11) ------- does Gina do at the weekends? –She reads books. ------- many books has she read so far? –Many. 12) ------- were you doing? –Painting. ------- colors did you use? –Blue, yellow, green, red

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