NUMERICAL EQUATION
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In a Numerical equation every quantity except the unknown quantity is a particular number, as x4  7x3 + 4x2  5 = 0. The Numerical value of an algebraical formula is the number obtained by substituting numbers for their equivalent algebraical symbols which compose the formula, and reducing the result to its simplest form; thus if s =1/2ft2 when f = 32 and t = 5, the Numerical Value of s is 400.
By Henry Percy Smith
Word of the day
Westphal's Symptom
 Absence of kneejerk. absence of kneejerk in locomotor ataxia.