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the first non-zero digit in a decimal fraction. It can appear before or after the decimal comma.
if data has been arranged in classes, then the median class is the middle class after the...
represents the rate of change or gradient of a function at any particular point.
if two triangles are equiangular, then the corresponding sides are in proportion and the...
a cone with the line from the vertex to the centre of the base perpendicular to the base.
a number which combined with its inverse results in the identity 1, e.g. 4 × ¼ = 1.