Phuong
Giới thiệu về bản thân
Chào mừng bạn đến với trang cá nhân của Phuong
0
0
0
0
0
0
0
2023-09-09 21:42:14
a) A = ( \(\dfrac{1}{3}\) - \(\dfrac{8}{15}\) - \(\dfrac{1}{7}\) ) + ( \(\dfrac{2}{3}\) + \(\dfrac{-7}{15}\) + \(1\dfrac{1}{7}\) )
= \(\dfrac{1}{3}\) - \(\dfrac{8}{15}\) - \(\dfrac{1}{7}\) + \(\dfrac{2}{3}\) + \(\dfrac{-7}{15}\) + \(\dfrac{8}{7}\)
= ( \(\dfrac{1}{3}\) + \(\dfrac{2}{3}\) ) - ( \(\dfrac{8}{15}\) + \(\dfrac{7}{15}\) ) - ( \(\dfrac{1}{7}\) - \(\dfrac{8}{7}\) )
= 1 - 1 + 1
= 1
