Presentation on theme: "Students Mentoring Students Presents: Learning Exponents!"— Presentation transcript:
1Students Mentoring Students Presents: Learning Exponents! Ruben Sanchez
2BEFORE WE START:We are here to help you! Do NOT be afraid to ask questions.There are no dumb questions!The only dumb thing to do is not ask for help when you are stuck.
3Laws of exponentsWhen dealing with exponents, there are times we will have to operations such as adding, subtracting, dividing, and multiplying exponents.We will learn these steps by using the methods of MADSPM (easy way to remember it is by mad spam)
4MA DS PM What exactly is madspm?? Madspm is guide to help us understand and carry out opperations with exponents correctly, and helps us understand what to do in math questions involving exponents.MAWHEN WE MULTIPLY LIKE VARIABLE EXPONENTSWE ADD THE EXPONENTSDSWHEN WE DIVIDE LIKE VARIABLE EXPONENTSWE SUBTRACT EXPONENTSPMWHEN WE HAVE EXPONENTIAL VARIABLES RAISDED TO A POWERWE MULTIPLY THE EXPONENTS
5MultiplyingWhen we look at the MA part of MADSPM, we are dealing with problems that involve multiplication of variables.Lets look at an example of what to do when we multiply.First we establish that we have 2 like variables. We continueby multiplying the coefficients, or the numbers, in front of theX variable.Once we do that we come up with an answer of 21. Then weLook at the X variable and see that both X’s are raised to the 1Power. All we do with the X variables is add the exponent it isRaised to. In this case both are 1, so 1+1=2. The 2 is going to beOur new exponent of the X variable.So what does our answer look like???
6Multiplying Lets look at another example. We see we are going to multiply. What do we do??Multiply the coefficientsAdd the exponents of the variablesGet our result.
8DividingWhen we look at the DS part of MADSPM, we are dealing with problems that involve division of variables.Lets look at an example of what to do when we divide.First we establish that we have 2 like variables. We continueby dividing the coefficients, or the numbers, in front of theX variable.Once we do that we come up with an answer of 1/2. Then welook at the X variable and see that one X variable is raised to the 4Power and that one is raised to the 3 power. All we do with the X variablesIs subtract the exponents they are raised to. In all cases it will be the top minusthe bottom. So we are going to subtract 4-3=1
9Dividing (continuing) Our answer will look like this. The top coefficient will be 1 and sincewe are left with one X, it will stay on the top.Note that the X will always go on the top if the exponent is positive! In this case theexponent was a positive one, so the X is raised to the power of 1.Lets look at what happens when we have negative exponents
10Dividing (Continuing) We carry out the same process as the previous problem. Since 2/7 isalready a simplified fraction, that stays the same. Now since we aredividing exponents we still subtract top minus the bottom. In this case2-5= -3.We still write the X variable with a -3 exponent on the top but,since we cannot have a negative exponent on the top, we needto move it down. When we move down the negative exponentit changes to a positive exponent.So what would our answer look like? The fraction cannot besimplified so it stays the same but since we bring down thenegative exponent, it turns positive when you bring it down. This is what our answer looks like
12Powers raised to powers When we look at the PM part of MADSPM, we are dealing with problems that involve powers being raised to other powers with variables.Lets look at an example of what to do when we see powers raised to powers.When we see this, all we do is multiply the EXPONENTS. In this casethere is no coefficient so we do not distribute to a coefficient. If therewas a number in front of X we would need to distribute a 3 to thatnumber as well as X.All we do in this case is multiply 8 x 3 = 24. So what doesour answer look like? Well this is what we are supposed to get.
13Powers raised to powers Lets look at an example when we have coefficients and a variable raised to a power.In this example, we are going to distribute a power of 6 to eachterm inside the parenthesis. So the 2 is going to be raised to a powerof 6 and the same rule of MADSPM applies to the X variable. We onlyMultiply the variable’s (letter) exponent by whatever it is being raised to.1)So the 2 will be raised to a power of 6 to getWhich equals3)So our final answer looks like2)Then we multiply the X variable’s powers, 7 x 6 = 42.