Smooth function has derivatives of all orders. Polynomials have derivatives of all orders, thus polynomials are smooth functions.
For example: f(x)=2x+3 => f'(x)=2 => f''(x)=0 => f'''(x)=0...
So all derivatives exist. (Derivative being zero is ok.)
Their continuity can be proven using the Weierstrass (epsilon-delta) definition.
they have variable
That would be an infinitely long line. Or just called a line if you are talking about graphs
False! If the graph is exactly the same, then the x-intercepts will be the same which implies the roots are them same. However, you can have the same roots and different graphs. So while the first statement is true, the converse if not.
Adding and subtracting polynomials is simply the adding and subtracting of their like terms.
The sum of two polynomials is always a polynomial. Therefore, it follows that the sum of more than two polynomials is also a polynomial.
Polynomials have graphs that look like graphs of their leading terms because all other changes to polynomial functions only cause transformations of the leading term's graph.
false
Both are polynomials. They are continuous and are differentiable.
No it is not.
Polynomials are continuous everywhere, so there are not points of discontinuity.
Yes.
Easy to compare multiple continuous data sets
Usually the change is tracked against time and time is a continuous variable. It is customary, when the independent variable is continuous, to use line graphs. However, if the data are populations at five- or ten-year intervals - for example, from censuses - then you might find that they are shown as a bar graph.
Mostly bar graphs unless the experiment is continuous
f is a piecewise smooth funtion on [a,b] if f and f ' are piecewise continuous on [a,b]
Other polynomials of the same, or lower, order.
produce smooth, continuous muscle contraction