The computer answer to "A Problem from Gaokao 2016" is wrong.

A Problem from Gaokao 2016 Algebra Level pending If a>b>1,0<c<1,

then alog (base b) of c < blog (base a) of c <---- Computer's answer (3rd choice down)

I did this: Suppose a = 9, b = 4, and c = 1/2.

Substitute these into the computer's alleged answer:

9log(base 4) of (1/2) versus 4log(base 9) of (1/2) ==>

9log(1/2)/log(4) versus 4log(1/2)/log(4) ==>

9/log(4) versus 4/log(9) ==>

9log(9) versus 4log(4)

9log(9) is NOT less than 4log(4)

#Algebra

Note by Linda Slovik
2 years, 10 months ago

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