If , the least value of…

MATHEMATICS · Single correct · A Level · Mathematics · Exponentials and logarithms · Exponentials and logarithms

Problem

If

\log_3 27\cdot\log_x 7=\log_{27}x\cdot\log_7 3

, the least value of

x

is (1)

7^{-3}

(2)

3^{-7}

(3)

7^3

(4)

3^7

Related theory

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