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 December 11th, 2018, 11:01 PM #1 Banned Camp   Joined: Dec 2018 From: vryry Posts: 17 Thanks: 0 How to solve this Hello sir How to solve this (1+a/b)^x = z/y
 December 12th, 2018, 12:14 AM #2 Global Moderator   Joined: Dec 2006 Posts: 21,028 Thanks: 2259 For which variable?
 December 12th, 2018, 12:22 AM #3 Banned Camp   Joined: Dec 2018 From: vryry Posts: 17 Thanks: 0 Hello sir How to solve variable x
 December 12th, 2018, 12:44 AM #4 Global Moderator   Joined: Dec 2006 Posts: 21,028 Thanks: 2259 x = ln(z/y)/ln(1 + a/b)
 December 12th, 2018, 02:05 AM #5 Banned Camp   Joined: Dec 2018 From: vryry Posts: 17 Thanks: 0 Hello sir Then what to do next step after natural log
 December 12th, 2018, 02:28 AM #6 Senior Member   Joined: Dec 2015 From: somewhere Posts: 727 Thanks: 98 Just add the logarithm to both sides
 December 12th, 2018, 03:19 AM #7 Banned Camp   Joined: Dec 2018 From: vryry Posts: 17 Thanks: 0 x = ln(z/y)/ln(1 + a/b) how to remove log ln
 December 12th, 2018, 03:33 AM #8 Global Moderator     Joined: Oct 2008 From: London, Ontario, Canada - The Forest City Posts: 7,968 Thanks: 1152 Math Focus: Elementary mathematics and beyond $\displaystyle x=\log_{1+\frac ab}\left(\frac zy\right),\quad\frac ab>0$ Last edited by greg1313; December 12th, 2018 at 04:31 AM.
December 12th, 2018, 07:09 AM   #9
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Quote:
 Originally Posted by VRTTWETET Then what to do next step after natural log
You later posted "how to remove log ln".
You can use a logarithm with a logarithmic base of your choice, but you can't solve without using a logarithm. What logarithmic base would you find acceptable?

 December 12th, 2018, 09:46 PM #10 Banned Camp   Joined: Dec 2018 From: vryry Posts: 17 Thanks: 0 Hello sir How it is solved how the power are transferred (1+r/12)^6×5662=5774 (1+r/12)^6=5774/5662 1+r/12=(5774/5662)^1/6

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