e: 2.718281828..... The base of the natural logarithm function. e can be found from the series
2 + 1/2! + 1/3! + 1/4! + 1/5! + ...........
eccentricity: A number that indicates the shape of a conic section. The eccentricity of
ellipse is given by
e = sqrt(a2 - b2)
element: a member of a set.
ellipse: the set of all points in a plane such that the sum of the distances to two fixed
is a constant. The equation of an ellipse with center at the origin is
x2 + y2 = 1
ellipsoid: a solid of revolution formed by rotating an ellipse about one of its axes.
empty set: a set that contains no elements.
equation: a mathematical statement that says that two expressions have the same value.
equilateral triangle: a triangle that has three equal sides.
equivalent equations: two equations whose solutions are the same. For example:
x + 3y = 10, and 2x + 6y = 20.
even function: a function that satisfies the property that f(x) = f(-x).
even number: a natural number that is divisible by 2.
event: in probability, a set of outcomes.
exponent: a number that indicates the operation of repeated multiplication.
exponential function: a function of the form f(x)
= ax, where a is a constant known as the
extremum: a point where a function reaches a maximum or a minimum.
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