Tìm phân số:
x/9 (x Z) sao cho: x/9 <4/7 <x+1/9 .
mình đang cần gấp mong mn giúp vs ạ!!
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
`x/9 < 4/7 < (x+1)/9`
`\iff (7x)/63 < 36/63 < (7(x+1))/63`
`\iff 7x < 36 < 7(x+1)`
`\iff 7x < 36 < 7x + 7`
`\iff 7x > 36 – 7`
`\iff 7x > 29`
`\iff x > 29/7`
Vậy phân số `x/9` nhỏ nhất cần tìm ở đây là `5/9`