SAT Math Practice Question #26909 - SATify | SATify

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SAT Math Practice Question #26909 - SATify | SATify

#26909

algebra

logarithms

Change of Base

hard

150 sec

For what value of $x$ does $lo g_{3} x + lo g_{9} (x^{2}) + lo g_{27} (x^{3}) + lo g_{81} (x^{4}) = 20$ ?

A.

81

B.

243

C.

729

D.

2187

E.

6561