问题
选择题
若正实数a,b满足a+b=1,则
|
答案
∵正实数a,b满足a+b=1,
∴
+1 a
=4 b
+a+b a
=5+(4(a+b) b
+b a
)≥94a b
故
+1 a
的最小值是94 b
故选D
若正实数a,b满足a+b=1,则
|
∵正实数a,b满足a+b=1,
∴
+1 a
=4 b
+a+b a
=5+(4(a+b) b
+b a
)≥94a b
故
+1 a
的最小值是94 b
故选D