问题
填空题
已知abc≠0,且
|
答案
设
=a b
=b c
=t(t≠0),则c a
a=bt①
b=ct②
c=at③
将①②③相乘得abc=abct,
∵abc≠0,∴t=1,∴a=b=c,
∴
=3a+2b+c a-2c-3c
=-6a -4a
,3 2
故答案为-
.3 2
已知abc≠0,且
|
设
=a b
=b c
=t(t≠0),则c a
a=bt①
b=ct②
c=at③
将①②③相乘得abc=abct,
∵abc≠0,∴t=1,∴a=b=c,
∴
=3a+2b+c a-2c-3c
=-6a -4a
,3 2
故答案为-
.3 2