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7-75.

Change each of the following equations from logarithmic form to exponential form, or vice versa.

$k=\log _b(N)$ is equivalent to $N=b^k$

1. $y=\log_{12}x$

$x=12^y$

2. $x=\log_y17$

3. $y=1.75^{2x}$

$2x=\log_{1.75}(y)$

4. $3y=x^7$