tìm x thuôc z 5/17+-4/19+-20/21+12/17+-11/31

26/10/2021

By Adalyn

tìm x thuôc z
5/17+-4/19+-20/21+12/17+-11/31 { "@context": "https://schema.org", "@type": "QAPage", "mainEntity": { "@type": "Question", "name": " tìm x thuôc z 5/17+-4/19+-20/21+12/17+-11/31

5/17+-4/19+-20/21+12/17+-11/31<x/9< hoặc bằng -3/7+7/15+4/-7+8/15+2/3

→(5/17+12/17)+−4/19+−20/21+−11/31<x/9≤(−3/7+4/−7)+(7/15+8/15)+2/3

→1+−4/19+−20/21+−11/31<x/9≤(−3/7−4/7)+1+2/3

→12369/12369−26041/2369−11780/12369−4389/12369<x/9≤−1+1+2/3

→−6404/12369<x/9≤2/3

→−19212/4123<x≤6

→−4≤x≤6 vì x∈Z

→x∈{−4,−3,−2,−1,0,1,2,3,4,5,6}

@ara bos ris