Toán Biết x = a+b, a € {25;38} b € {14;23} ^^ giúp 23/07/2021 By Melody Biết x = a+b, a € {25;38} b € {14;23} ^^ giúp
25+14,25+23,38+14,38+23
x=39,49,52,61
@Vuy
Đáp án:
`a ∈ {25;38} b ∈ {14;23}`
`⇒x=25+38+14+23`
`⇒x=100`
@Star