Contact us
Choose a category below so we can get back to you as quickly as possible.
解 -30 ∴ 丨a+3丨-丨4-a丨-(3-a) =(a+3)-(4-a)-(3-a) =a+3-4+a-3+a =3a-4
∵3≤a≤4 ∴丨4-a丨+丨3-a丨=4-a+a-3=1
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.