v
V : Roman Symbol for 5
Value , Absolute : The absolute value of real no is its
numerical value without regard to sign. The absolute value of a number can be
considered as the distance between zero and that number.
Value of Expression : An expression consists of a set of
operators, functions or keywords and its value is the outcome obtained after
performing operations.
Value of Function : Value of function is the outcome obtained
after assigning suitable value to the independent variable.
Vanish : A function vanishes when its value becomes zero.
Variable : A quantity usually represented by x that can take
different values. An integer variable can have only integral values
whereas a real variable can have only fractional
value also. In y = f(x) , x is
independent variable and y is dependent variable.
Variance : In Statistics, variance is a measure of variability;
the mean square deviation from the mean, that is , the mean of the squares of
the differences between individual values of x and the mean value . The
variance in a population is given by
2 = ∑( x- mean)2 /
N
Variate : A random variable with a numerical value that is
defined on a given sample space.
Variation : Deviation of a variable from the mean value.
Variation of Function : In an interval [a,b] , the variation of
function takes place as the value of independent variable changes. For a
function of constant value, there will not be any change in the value of the
function.
Variable : A symbol whose value can change.
Vector : Any quantity which has both magnitude and direction at
each point in space , as opposed to a scalar which has only magnitude. We
represent a vector geometrically by an arrow of length proportional to its
magnitude , pointing in the assigned direction. Any vectors can be represented
in terms of its components along the coordinate axes XS, Y, and Z. a vector
drawn from the origin to a given point is called position vector and is usually
symbolized by r in rectangular Cartesian coordinates as r = xi + yj + zk.
Vector, Parallelogram of : A Parallelogram that is constructed
in order to add two vectors, by drawing them to scale so that they form two
adjacent sides of the parallelogram.
Vector analysis : A branch of Mathematics dealing with vectors,
their relations and applications.
Velocity : The rate of change of position. Velocity is a vector quantity.
Velocity =
displacement / time
Velocity of Light : Usually denoted by c . its value is 3 x 1010 m/s.
Venn Diagram : The Venn diagram is made up of two or more
overlapping circles and it is used to show relationship between sets. Different
sets are shown as circles in a big rectangle represent ting the universal set.
Intersecting circles denote intersecting sets. Separate circles show disjoint
set.
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Vertex, Vertices : 1. A corner of a
polygon. 2. A node in a graph. 3. A local extreme point of curvature.
Vertical Line : A line which points
to or away from the centre of the earth. A vertical line is perpendicular to a
horizontal line.
Vertex : Point where surfaces meet-corner.
Vertical Opposite angles : The angles that
are formed when two lines intersect each
other and angles opposite to each other
are equal as shown below; A= B
B
Vigesimal : related to intervals of 20.
Vitali Set : A set of real numbers such that no two real numbers of the set
have a difference which is rational number and each real number is equal to a
rational number plus a number of the set.
Vinculum : The horizontal bar in a fraction separating the numerator from
the denominator.
Volume : The measure of space occupied by a solid body.
Vulgar fraction : A common fraction.
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