00:00This is a very good formula, a very good trick, limit x tends to 0, a to power x, minus
00:05b to power x, upon x,
00:07is equal to ln a upon b.
00:10Like once, they asked something like this, 7 to power x, minus 3 to power x, divide by x.
00:18So, what is the answer?
00:20ln 7 upon 3.
00:23Okay, it's very simple.
