Toán (7/2^9-14/2^11+21/768)^2:(5/2^9-20/2^12+25/1280)^2 18/11/2021 By Mary (7/2^9-14/2^11+21/768)^2:(5/2^9-20/2^12+25/1280)^2
Đáp án: `↓↓` Giải thích các bước giải: `((7/(2^9)-14/2^11+21/768)^2)/((5/2^9-20/2^12+25/1280)^2)` `=(7.(1/2^9-2/2^11+3/768)^2)/(5.(1/2^9-4/2^12+5/1280)^2)` `=7^2/5^2=49/25` Trả lời
`(7/2^9-14/2^11+21/768)^2/(5/2^9-20/2^12+25/1280)^2 =\frac{7(1/2^9-2/2^11+21/768^2)}{5(1/2^9 -4/2^12+5/1280)^2}= (7/5)^2 = 49/25 ` Trả lời
Đáp án:
`↓↓`
Giải thích các bước giải:
`((7/(2^9)-14/2^11+21/768)^2)/((5/2^9-20/2^12+25/1280)^2)`
`=(7.(1/2^9-2/2^11+3/768)^2)/(5.(1/2^9-4/2^12+5/1280)^2)`
`=7^2/5^2=49/25`
`(7/2^9-14/2^11+21/768)^2/(5/2^9-20/2^12+25/1280)^2 =\frac{7(1/2^9-2/2^11+21/768^2)}{5(1/2^9 -4/2^12+5/1280)^2}= (7/5)^2 = 49/25 `