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Q. Definition of Logarithms?
Ans.
A logarithm to the base a of a number x is the power to which a is raised to get x.
In equation format:
If x = ay, then loga x = y.
Example: Convert the logarithmic equation log3 9 = 2 to an exponential equation.
Solution:
log3 9 = 2
32 = 9
Example: Convert the logarithmic equation log2 16 = 4 to an exponential equation.
log2 16 = 4
24 = 16
Example: Convert the logarithmic equation log5 1/25 = -2 to an exponential equation.
log5 1/25 = -2 5-2 = 1/25
2x + 3x
3x3
In a frequency distribution mode is 7.88, mean is 8.32 find the median. (Ans: 8.17) Ans: Mode = 3 median - 2 mean 7.88 = 3 median - 2 x 8.32 7.88 +16.64 = 3 median
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