How is this logx=4 done?

Question

7225 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-09-10T21:09:00

#x = 10,000#

If no base of the log is shown, it means it is 10.

Log form and exponential form are interchangeable.

#log_a b = c " "hArr " "a^c = b#

"The base stays the same and the other two change around"

In this case, change the log form to index form:

#log_10 x = 4 " "hArr " " 10^4 = x#

#x = 10,000#