Question

Which of the following is equivalent to y = log, x? (1) y=x? (3) x = 79 (2) x=y? (4) y=x!

Answer 1

Let's employ the first identity in logarithms.

$\begin{gathered} \text{If a}^x=b \\ \text{then, x=}\log _ab \end{gathered}$

Thus,

$\begin{gathered} \text{If y=}\log _7x \\ \end{gathered}$

Then;

$x=7^y$

Thus the answer is option (3)