Integer exponents, Mathematics

Assignment Help:

We will begin this chapter by looking at integer exponents.  Actually, initially we will suppose that the exponents are +ve as well. We will look at zero & negative exponents in a bit.

Let's firstly recall the definition of exponentiation along with positive integer exponents.  If a is any number and n is a +ve integer then,

2040_Integer Exponents.png

Thus, for example,

                                                 35=3.3.3.3.3 = 243

We have to also employ this opportunity to remind ourselves regarding parenthesis and conventions which we have in regards to exponentiation & parenthesis. It will be specifically important while dealing with negative numbers.  Assume the following two cases.

                       (-2)4m                 and            -24

These will contain different values once we appraise them.  While performing exponentiation keep in mind that it is only the quantity which is instantly to the left of the exponent which gets the power.

In the initial case there is a parenthesis instantly to the left so this means that everything within the parenthesis gets the power. Thus, in this case we get,

                                       (-2)4 = ( -2) (-2) ( -2) ( -2) = 16

In the second case though, the 2 is instantly to the left of the exponent and thus it is only the 2 that gets the power. The minus sign will stay out in front & will NOT get the power.  In this case we have the following,

                            -24 = - (24 ) = - (2 ⋅ 2 ⋅ 2 ⋅ 2) = - (16) = -16

We put in some added parenthesis to help in illustrate this case. Generally they aren't involved and we would write instead,

                                                         -24  = -2 ⋅ 2 ⋅ 2 ⋅ 2 = -16

The instance of this discussion is to ensure that you pay attention to parenthesis. They are significant and avoiding parenthesis or putting in a set of parenthesis where they don't associate can totally change the answer to a problem.  Be careful.  Also, this warning regarding parenthesis is not just intended for exponents. We will have to be careful with parenthesis during this course.

Now, let's take care of zero exponents & negative integer exponents. In the particular case of zero exponents we have,

                                                                   a0 = 1        provided a ≠ 0

Notice down that it is needed that a not be zero. It is important since 00 is not defined.  Here is a rapid example of this property.

                                                 (-1268)0 = 1

We contain the following definition for -ve exponents.  If a is any non-zero number & n is a +ve integer (yes, positive) then,

                                                  a- n  =  1 /an

Can you see why we needed that a not be zero? Keep in mind that division by zero is not described and if we had let a to be zero we would have gotten division by zero.  Here are a couple of rapid examples for this definition,

5-2  = 1 /52 =  1/25                                             ( -4)-3  = 1/(-4)3 = 1/-64 =-(1/64)

Here are some main properties of integer exponents. Accompanying each of property will be a rapid example to show its use.  We shall be looking at more complex examples after the properties.


Related Discussions:- Integer exponents

Graphical method for interpolation, Graphical Method Whil...

Graphical Method While drawing the graph on a natural scale, the independent variables are marked along the horizontal line and corresponding dependen

Basics of series - sequences and series, Series - The Basics That top...

Series - The Basics That topic is infinite series.  So just define what is an infinite series?  Well, let's start with a sequence {a n } ∞ n=1 (note the n=1 is for convenie

Ellipse, different types of ellipse

different types of ellipse

The dimensions are 2x and 4x what is area of sara''s bedroom, Sara's bedroo...

Sara's bedroom is within the shape of a rectangle. The dimensions are 2x and 4x + 5. What is the area of Sara's bedroom? Because the area of a rectangle is A = length times wid

Find the equation for each of the two planes , Find the equation for each o...

Find the equation for each of the two planes that just touch the sphere (x - 1) 2 + (y - 4) 2 + (z - 2)2 = 36 and are parallel to the yz-plane. And give the points on the sphere

Examples on log rules, Examples on Log rules: Example:      Calculate...

Examples on Log rules: Example:      Calculate (1/3)log 10   2. Solution: log b n√A = log b A 1/n = (1/n)log b A (1/3)log 10 2 = log 10 3 √2 = log 10 1.

Domain of a vector function - three dimensional space, Domain of a Vector F...

Domain of a Vector Function There is a Vector function of a single variable in R 2 and R 3 have the form, r → (t) = {f (t), g(t)} r → (t) = {f (t) , g(t), h(t)} co

Formular for x and y, I have a simple right angle triangle. All I am given...

I have a simple right angle triangle. All I am given is h (the hypotenuse) and that ratio of x:y is 2:3. What is the formula to find x and y in terms of h?

Determine the area of the matting, A circular print is being matted in a sq...

A circular print is being matted in a square frame. If the frame is 18 in by 18 in, and the radius of the print is 7 in, what is the area of the matting? (π = 3.14) a. 477.86 in

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd