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Si të kuptoni dhe të manipuloni logaritmet me anë të produktit, kuotës dhe rregullave të fuqisë



Kuptimi Logaritmit Vetit Dhe Rregullat E Logaritmitrar




Logarithms are a very useful mathematical concept that can help us simplify expressions and solve equations involving exponents. In this article, I will explain what logarithms are, what are their properties and rules, and how to use them in different situations. I hope you will find this article informative and interesting.




Kuptimi Logaritmit Vetit Dhe Rregullat E Logaritmitrar


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What are logarithms?




A logarithm is defined as the power to which a number must be raised to get some other value. It is the opposite function of exponentiation. For example, if 10 = 100 then log10 100 = 2. This means that we need to raise 10 to the power of 2 to get 100.


Definition of logarithm




The general form of a logarithm is written as:


logb a = x


This means that b = a, where b is the base of the logarithm, a is the argument of the logarithm, and x is the value of the logarithm. The base b must be a positive number not equal to 1, and the argument a must be a positive number.


Common logarithm and natural logarithm




There are two special types of logarithms that are widely used in mathematics and science: the common logarithm and the natural logarithm.


The common logarithm has a base of 10 and is written as log or log10. It tells us how many times we need to multiply 10 by itself to get a certain number. For example, log 1000 = 3 because 10 = 1000.


The natural logarithm has a base of e, which is an irrational number approximately equal to 2.71828. It is written as ln or loge. It tells us how many times we need to multiply e by itself to get a certain number. For example, ln e = 1 because e = e.


Examples of logarithms




Here are some examples of how to evaluate logarithms:



  • log2 8 = 3 because 2 = 8



  • log5 25 = 2 because 5 = 25



  • log10 0.01 = -2 because 10 = 0.01



  • ln e = 4 because e = e



  • ln 1 = 0 because e = 1



  • e^x=5 => ln(e^x)=ln(5) => x=ln(5)



  • e^x+1=7 => ln(e^x+1)=ln(7) => x+1=ln(7) => x=ln(7)-1



  • e^x-1/2x+1/4x-1/8x+...=9 => ln(e^x-1/2x+1/4x-1/8x+...)=ln(9) => x-1/2x+1/4x-1/8x+...=ln(9)



  • e^x=9 => ln(e^x)=ln(9) => x=ln(9)



  • e^x=e^y => ln(e^x)=ln(e^y) => x=y



  • e^x=e^(y+z) => ln(e^x)=ln(e^(y+z)) => x=y+z



  • e^x=e^(y-z) => ln(e^x)=ln(e^(y-z)) => x=y-z



  • e^x=e^(yz) => ln(e^x)=ln(e^(yz)) => x=yz



  • e^x=e^(y/z) => ln(e^x)=ln(e^(y/z)) => x=y/z



  • e^x=e^(y^z) => ln(e^x)=ln(e^(y^z)) => x=y^z



  • e^x=e^(sqrt(y)) => ln(e^x)=ln(e^(sqrt(y))) => x=sqrt(y)



  • e^x=e^(sin(y)) => ln(e^x)=ln(e^(sin(y))) => x=sin(y)



  • e^x=e^(cos(y)) => ln(e^x)=ln(e^(cos(y))) => x=cos(y)



  • e^x=e^(tan(y)) => ln(e^x)=ln(e^(tan(y))) => x=tan(y)



  • e^x=e^(log(y)) => ln(e^x)=ln(e^(log(y))) => x=log(y)



  • e^x=e^(ln(y)) => ln(e^x)=ln(e^(ln(y))) => x=ln(y)



  • e^x=e^(e^(y)) => ln(e^x)=ln(e^(e^(y))) => x=e^(y)



  • e^x=e^(e^(e^(y))) => ln(e^x)=ln(e^(e^(e^(y)))) => x=e^(e^(y))



  • e^x=e^(e...(e...(y)))=> ln(e^x)=ln(e...(e...(y)))=> x=e...(e...(y))



Properties of logarithms




The properties of logarithms allow us to manipulate and simplify expressions involving logs. They also help us convert between different bases of logs. Here are some of the most important properties:


Product rule




The product rule states that the log of a product is equal to the sum of the logs of its factors. In other words:


logb(a*c) = logba + logbc


This property can be used to expand or condense logs that involve multiplication.


Quotient rule




The quotient rule states that the log of a quotient is equal to the difference of the logs of its numerator and denominator. In other words:


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logb(a/c) = logba - logbc


This property can be used to expand or condense logs that involve division.



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