a ) A giao B = A
b) A giao B = \(\varnothing\)
c) A giao B = \(\varnothing\)
đúng đấy bn
a) A giao B = A
b) A giao B = \(\varnothing\)
c) A giao B = \(\varnothing\)
CHÚC BN HỌC TỐT
a ,A giao B = A
b, A giao B = \(\varnothing\)
c. A giao B =\(\varnothing\)
a) A giao B = A
b) A giao B = \(\varnothing\)
c) A giao B = \(\varnothing\)
k mik nhé