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8. Prove the following statements. (1) logp b x = 2log x (2) log p1 b p x = log x (3) log 4 x2 = log p x 9. Given that log2 = x, log3 = y and log7 = z, express the following expressions
Section 1. Logarithms. The mathematics of logarithms and exponentials occurs naturally in many branches of science. It is very important in solving problems related to growth and decay. The growth and decay may be that of a plant or a population, a crystalline structure or money in the bank.
Logarithms can have different bases, but the most common ones are base 10 (called the common logarithm) and base e (called the natural logarithm, where e is approximately 2.718). The logarithmic function is the inverse of the exponential function, making it a useful tool for dealing with exponential growth and decay.
Logarithms are the mathematical function that is used to represent the number (y) to which a base integer (a) is raised in order to get the number x: x = ay; where y = loga(x). Most of you are familiar with the standard base-10 logarithm: y = log10(x); where x = 10y.
After reading this text and / or viewing the video tutorial on this topic you should be able to: explain what is meant by a logarithm. state and use the laws of logarithms. solve simple equations requiring the use of logarithms.
4 Free worksheets with answer keys on logarithms. Each one has model problems worked out step by step, practice problems and challenge proglems.
Define ‘logarithm’: the logarithm of a number to any positive base is the index when the number is expressed as a power of the base, ie. a x = y ⇔ log a y = x , where a > 0 , y > 0 .
