視頻BV19V411t7Sx題11.解析
1 <log(8)(9)
即1 < log(2)(9^(1/3))
即1 <2/3log(2)(3)
即3/4 <1/2log(2)(3)
a<c
log(2)(3)<1,log(5)(16)>1
即log(2)(3)<log(5)(16)??
即log(2)(3)< 4log(5)(2)
即1/2log(2)(3)<2log(5)(2)
即c<b
綜述
有a<c<b
1 <log(8)(9)
即1 < log(2)(9^(1/3))
即1 <2/3log(2)(3)
即3/4 <1/2log(2)(3)
a<c
log(2)(3)<1,log(5)(16)>1
即log(2)(3)<log(5)(16)??
即log(2)(3)< 4log(5)(2)
即1/2log(2)(3)<2log(5)(2)
即c<b
綜述
有a<c<b
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