What is the exponential form of $log_b 35=3$ ?

Question

8717 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-06-07T14:44:35

$b^3=35$

Lets start with some variables

If we have a relation between $a," "b," "c$ such that
$color (blue)(a=b^c$

If we apply log both sides we get

$loga=logb^c$

Which turns out to be

$color (purple)(loga=clogb$

Npw divding both sides by $color (red)(logb$

We get

$color (green)(loga/logb=c* cancel(logb)/cancel(logb)$

[Note: if logb=0 (b=1) it would be incorrect to divide both sides by $logb$ ... so $log_1 alpha$ isn't defined for $alpha!=1$ ]

Which gives us $color (grey)(log_b a=c$

Now comparing this general equation with the one given to us...
$color (indigo)(c=3$
$color (indigo)(a=35$

And so, we again get it in form
$a=b^c$

Here
$color (brown)(b^3=35$

What is the exponential form of log_b 35=3log_b 35=3?