CHO A+B+C = 0 CMR
Câu 1:
Cho a+b+c = 0
CMR:
(
a b
b c
c a
)(
c
a
b
)
9
c
a
b
a b
b c
c a
Câu 1:
Cho a+b+c = 0
CMR:
(
a b
b c
c a
)(
c
a
b
)
9
c
a
b
a b
b c
c a