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[函数] 函数型问题比大小

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力工 Posted at 2024-1-4 14:52:46 |Read mode
函数型问题比较大小,求指点
已知实数$a,b$满足$3^a+4a=4^b+3b$,则(  )
A.$0<a<b<1$        B.$b<a<0$  C.$1<a<b$  D.$a=b$
正确的是A,B,D

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realnumber Posted at 2024-1-5 08:35:17
Last edited by realnumber at 2024-1-5 15:51:00等式成立时,可能成立的选项是()

a=b=0或1时,左右相等,
QQ啊啊1截图20240105082745.png QQ啊啊啊2截图20240105083115.png

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