PreCalculus - Logarithmic & Exponential Functions (1 of 20) x=? for 3^x=5 and 2^(x-1)=7

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In this video I will find x=? for 3^x=5 and 2^(x-1)=7.

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Wish I could have had your help 47 years ago when I started math classes in college..thanks a lot...

bigstuff
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I am glad to have your playlist on logarithm. I am this week relearning logarithm.

pinklady
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When would you use ln and when log? How do you decide? Ln would be when e would be involved, but why did you use it in first example? Just for example only?

tl
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aren't you meant to use log instead of In when there isn't e

zanekhan
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Sir why you have taken ln rather than log. Why we required Natural Log in this case?

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