Đáp án: `= 21/25`
Giải thích các bước giải:
`(25 .(-35)^19 . 27^8)/(|-15|^23 . (-49)^9)`
`= (5^2 . (-5)^19 . (-7)^19 . 3^24)/(3^23 . 5^23 . 7^9 . (-7)^9)`
`= (-1.7^2 . 3)/(5^2.(-7))`
`= (7^2 .3)/(5^2 . 7)`
`= 21/25`
`=(5^2 . (-5)^19 . (-7)^19 . 3^24)/(3^23 . 5^23 . 7^9 . (-7)^9)`
`=((-5)^21 . (-7)^19 . 3^24)/(3^23 . 5^23 . 7^17 .(-7))`
`=(-1.7^2 . 3)/(5^2.(-7))`
`=(7^2 .3)/(5^2 . 7)`
`=21/25`
(5-y)^6-2(125-75y+15y^2-y^3)+1
vẽ anime Nữ đang khó hiểu đẹp lên nhe :))
Vì sao ta nói trong hình vuông chu vi tỉ lệ thuận với cạnh, còn diện tích thì không tỉ lệ thuận với cạnh?
Ex1: Choose the underlined work of phrase (marked A,B,C or D) in each sentences that needs correcting. 1. The children (are) playing (boarding) games, (and) their mother is (arranging) flowers. A B C D 2. (One) of his father's favourite (hobbies) is (playing) horse-riding, and he justpractises it (twice a month). A B C D 3. He (started) learning (how to) play (the) guitar (on) his elder brother. A B C D 4. Your favourite football match (will begin) at 3 p.m, (so) you should (arrive) there soon (to get) a good seat A B C D 5. She (will attend) the judo class next month (because) she intends (to have) a long (vacation) in Ho Chi Minh City. A B C D 6. He loves (to listen) to classical music, (but) he (spends) a little time (doing) it. A B C D 7. She (didn't enjoy) the party very much (because) she didn't like (music) and (to dance) there. A B C D 8. She's 18 and she's (France). She (lives) in a village near Toulouse. She (studies engineering) at university. A B C 9. She has (ashort) black hair and (very dark) eyes. She is (intelligent) and funny, but sometimes she's a bit sad (too). A B C D 10. She (loves) music and she likes (writing) songs. She can (plays) the guitar very well and she has a A B C (beautiful) voice. D CÁC BẠN GIÚP MIK VỚI CÁM ƠN NHIỀU
phân tích và rút gọn giúp mình 25xy-12x^2+12y^2=0
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