问题
解答题
已知m>0,n>0,且
|
答案
由
•(m
+m
)=3n
•(n
+5m
),得n
(
)2-2m
-15(mn
)2=0,n
即(
-5m
)(n
+3m
)=0,n
∵m>0,n>0,
∴m=25n,
=8m-
+3nmn 2m+3
+nmn 200n-
+3n25n2 50n+3
+n25n2
=
=3.198n 56n
已知m>0,n>0,且
|
由
•(m
+m
)=3n
•(n
+5m
),得n
(
)2-2m
-15(mn
)2=0,n
即(
-5m
)(n
+3m
)=0,n
∵m>0,n>0,
∴m=25n,
=8m-
+3nmn 2m+3
+nmn 200n-
+3n25n2 50n+3
+n25n2
=
=3.198n 56n