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If you know the values of logp for every prime, these can be used to determine the logarithm of any positive rational number just by using the rules log(ab)=bloga and log(ab)=log(a)+log(b). And if you don't remember what log(2) is, remember 210=1024?1000, therefore 10log(2)?3, or log(2)?0.3.

Converting between natural logarithmic and exponential ... YouTube Start of suggested clip End of suggested clip Seven except log base E. We write Ln. So we would just say Ln x equals seven let's try one the otherMoreSeven except log base E. We write Ln. So we would just say Ln x equals seven let's try one the other direction so we have Ln 9 equals y well Ln nine is the log base e of nine.

Converting from exponential to logarithmic - YouTube YouTube Start of suggested clip End of suggested clip So therefore all we're simply doing is just now taking just rewriting them in their form. So it'sMoreSo therefore all we're simply doing is just now taking just rewriting them in their form. So it's going to be negative 2 equals log base 1 over 36. I'm sorry what log base 6 of 1 over 36.

Logarithms - Converting Exponential into Log Form - YouTube YouTube Start of suggested clip End of suggested clip And the 4 which was the exponent. Actually just stays down here. So log base 3 of 81 equals 4 andMoreAnd the 4 which was the exponent. Actually just stays down here. So log base 3 of 81 equals 4 and that's perfectly equivalent to this first equation. Hopefully that makes sense to everyone good.

The value of 5 in logarithmic form is log(5) = 0.6989700043360189. If the base is 10, you want to know the power 10 must be raised to to equal 5. The answer is 10 to the 0.69897 (rounded) power equals 5. For most people, the easiest way to get this is to put =LOG(5) in an Excel spreadsheet.

How to Calculate Logarithms by Hand - Tutorial 2 - YouTube YouTube Start of suggested clip End of suggested clip So let's go ahead and try and write 64. As a power of 4. And you may know what power of 4 64 isMoreSo let's go ahead and try and write 64. As a power of 4. And you may know what power of 4 64 is right away and if so just bear with me for a few seconds.

Logarithms - The Easy Way! - YouTube YouTube Start of suggested clip End of suggested clip You need to multiply two fives five squared is 25.. Now what about log base four of one log of oneMoreYou need to multiply two fives five squared is 25.. Now what about log base four of one log of one is always equal to zero. What about log base seven of seven to the first power is seven.

Converting an exponential equation to logarithmic - YouTube YouTube Start of suggested clip End of suggested clip But just say x equals e. No x equals. Four say a equals e. And then y equals x it's kind of reallyMoreBut just say x equals e. No x equals. Four say a equals e. And then y equals x it's kind of really confusing with the x's isn't. It. Let's do it another. Way. Notice how the x.