

The
graphs of the
polynomial functions 
The
source
or original polynomial function 
Translating
(parallel shifting) of the polynomial function 
Coordinates of translations
and their role in the polynomial expression 
Sigma
notation of the polynomial 
Coefficients of the source
polynomial in the form of a recursive formula 





The
graphs of the
polynomial functions 
The
graph of a function ƒ
is drawing on the Cartesian plane, plotted with respect to
coordinate axes, that shows functional relationship between
variables. The points (x,
f (x)) lying on the curve
satisfy this relation. 

The
source
or original polynomial function 
Any
polynomial f (x)
of degree n >
1 in the general form, consisting
of n
+ 1 terms, shown graphically, represents translation of its
source (original) function in the direction of the coordinate
axes. 
The source polynomial function 

f_{s}(x)
= a_{n}x^{n}
+ a_{n}_{}_{2}x^{n}^{}^{2}
+
.
. . +
a_{2}x^{2}
+ a_{1}x



has
n
 1 terms
lacking second and the constant term, since its coefficients, a_{n}_{}_{1
}=
0
and a_{0
}=
0
while
the leading coefficient a_{n},
remains unchanged. 
Therefore,
the source polynomial function passes through the
origin. 
A
coefficient a_{i
}of
the source function is expressed by the coefficients of the general
form. 

Translating
(parallel shifting) of the polynomial function 
Thus,
to obtain the graph of a given polynomial function f
(x)
we translate (parallel shift)
the
graph of its source function in the direction of the xaxis
by x_{0}
and in the direction of the yaxis
by y_{0}. 
Inversely,
to put a given graph of the polynomial function beck to the
origin, we translate it in the opposite direction, by taking the
values of the
coordinates of translations with opposite sign. 

Coordinates of translations
and their role in the polynomial expression 
The
coordinates of translations we calculate using the formulas, 

Hence,
by plugging the coordinates of translations into
the source polynomial function f_{s}(x),
i.e., 

y
 y_{0}
= a_{n}(x
 x_{0})^{n}
+ a_{n}_{}_{2}(x
 x_{0})^{n}^{}^{2}
+
.
. .
+
a_{2}(x
 x_{0})^{2}
+ a_{1}(x
 x_{0}) 


and
by expanding above expression we get the polynomial function in
the general form 
f(x) =
y = a_{n}x^{n}
+ a_{n}_{1}x^{n}^{}^{1}
+ a_{n}_{}_{2}x^{n}^{}^{2}
+
.
. . +
a_{2}x^{2}
+
a_{1}x + a_{0}. 
Inversely, by plugging the coordinates of translations into
the given polynomial f
(x)
expressed in the general form,
i.e., 

y
+ y_{0}
= a_{n}(x
+ x_{0})^{n}
+ a_{n}_{}_{1}(x
+ x_{0})^{n}^{}^{1}
+
.
. .
+ a_{1}(x
+ x_{0})
+ a_{0} 


and
after expanding and reducing above expression we get its source polynomial
function. 
Note
that in the above expression the signs of
the coordinates of translations are already changed. 

Sigma
notation of the polynomial 
Coefficients of the source
polynomial in the form of a recursive formula 
According
to mathematical induction we can examine any
ndegree
polynomial function using shown method. 
Therefore,
the polynomial f
(x) =
y = a_{n}x^{n}
+ a_{n}_{1}x^{n}^{}^{1}
+ a_{n}_{}_{2}x^{n}^{}^{2}
+
.
.
.
+
a_{2}x^{2}
+
a_{1}x + a_{0} 
we can
write as



while, for k = 0, a_{n}
=
a_{n}, 

and from a_{n
 k} for
k =
n,
a_{0}
=
f(x_{0})
= y_{0}. 

Thus,
expanded form of the above
sum is 
y
 y_{0}
= a_{n}(x
 x_{0})^{n}
+ a_{n}_{}_{2}(x
 x_{0})^{n}^{}^{2}
+
. . .
+
a_{2}(x
 x_{0})^{2}
+ a_{1}(x
 x_{0}) 
where
x_{0}
and y_{0}
are coordinates of translations
of the graph of the source polynomial 
f_{s}(x)
= a_{n}x^{n}
+ a_{n}_{}_{2}x^{n}^{}^{2}
+
. . .
+
a_{2}x^{2}
+ a_{1}x

in
the direction of the xaxis
and the yaxis
of a Cartesian coordinate system. 

Therefore,
every given polynomial written in the general form can be
transformed into translatable form by calculating the
coordinates of translations x_{0}
and y_{0 }
and the coefficients a
of its source function. 

Coefficients
of the source polynomial function are related to its derivative
at x_{0} 
The
coefficients of the source polynomial are related to
corresponding value of its derivative at x_{0}
like the coefficients
of the Taylor polynomial in Taylor's or Maclaurin's formula,
thus 



Such
for example, the coefficient a_{1}
of the source cubic of
f(x) =
a_{3}x^{3}
+
a_{2}x^{2}
+
a_{1}x + a_{0} 
since
f ' (x)
=
3a_{3}x^{2}
+ 2a_{2}x
+
a_{1}
and x_{0}
=

a_{2}/(3a_{3})
then 









Functions
contents C 



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