LOG in Excel always returns a numeric value. Expressed mathematically x is the logarithm of n to the base b if bx n in which case one writes x log b n. In less formal terms the log rules might be expressed as.
For certain special arguments Log automatically evaluates to exact values.
Is always on the positive side of and never crosses the y-axis always intersects the x-axis at x1. Similarly all logarithmic functions can be rewritten in exponential form. Three kinds of functions that are often useful in mathematical models are linear functions exponential functions and logarithmic functions. 2 3 8 log 2 8 3 the base is 2.