Solving a Rational exponent(simplify)

  • Thread starter DPXJube
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In summary, the original expression c(c^5/6)/c^2 simplifies to c^5/6 * c^-2. Using the exponent law c^a * c^b = c^(a+b), this can be rewritten as c^(5/6 - 2) = c^(5/6 - 12/6) = c^(-7/6). However, this is incorrect and the correct answer is 1/c^(1/6). This can be found by rewriting the original expression as (c^1 * c^(5/6))/c^2 and then using the exponent law c^a/c^b = c^(a-b) to get c^(1-2) *
  • #1
DPXJube
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Homework Statement


Simplify. Write as positive exponent

c(c^5/6)/c^2


Homework Equations


None really, just exponent laws.


The Attempt at a Solution


c(c^5/6) comes out as...
c^5/6
Dividing exponents requires subtracting them so...
5/6 - 2/1
Find common denominator...
5/6 - 12/6
Equals
-7/6
Turning the whole thing into
c^-7/6

This is completely wrong though as the answer is apparently

1/c^1/6
I would like to know how one comes to this conclusion please.
 
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  • #2
DPXJube said:

Homework Statement


Simplify. Write as positive exponent

c(c^5/6)/c^2


Homework Equations


None really, just exponent laws.


The Attempt at a Solution


c(c^5/6) comes out as...
c^5/6 ⟵ This should be c11/6 .
Dividing exponents requires subtracting them so...
5/6 - 2/1
Find common denominator...
5/6 - 12/6
Equals
-7/6
Turning the whole thing into
c^-7/6

This is completely wrong though as the answer is apparently

1/c^1/6
I would like to know how one comes to this conclusion please.
See correction in red.
 
  • #3
Could you explain to me where exactly that fraction came from?
 
  • #4
1 + 5/6 = 11/6
 
  • #5
DPXJube said:

Homework Statement


Simplify. Write as positive exponent

c(c^5/6)/c^2


Homework Equations


None really, just exponent laws.
Well, those are "relevant equations"!


The Attempt at a Solution


c(c^5/6) comes out as...
c^5/6
What?? c(c5/6)= c5/6 if and only if c= 1.
c1c5/6= c1+ 5/6

Dividing exponents requires subtracting them so...
That's a very strange statement! Dividing the numbers requires subtracting the exponents.

5/6 - 2/1
Find common denominator...
5/6 - 12/6
Equals
-7/6
Turning the whole thing into
c^-7/6

This is completely wrong though as the answer is apparently

1/c^1/6
I would like to know how one comes to this conclusion please.
 

Related to Solving a Rational exponent(simplify)

1. What is a rational exponent?

A rational exponent is an exponent that is a fraction, where the numerator represents the power to which the base is raised, and the denominator represents the root to be taken.

2. How do you simplify a rational exponent?

To simplify a rational exponent, you can rewrite it as a radical expression. For example, x^(3/2) can be written as the square root of x cubed (x^(3/2) = √x^3).

3. What is the difference between a rational exponent and a radical expression?

A rational exponent and a radical expression both involve taking roots, but a rational exponent includes a power in addition to the root. For example, x^(3/2) is a rational exponent, while √x^3 is a radical expression.

4. Can you simplify a rational exponent if the exponent is negative?

Yes, you can simplify a rational exponent even if the exponent is negative. You can use the power rule to rewrite the exponent as a positive fraction, then simplify it as normal.

5. What are some common mistakes to avoid when simplifying rational exponents?

Some common mistakes to avoid when simplifying rational exponents include forgetting to apply the power rule, confusing the numerator and denominator of the exponent, and not simplifying the radical expression completely.

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