Given:
The expression is

To find:
The simplified answer using only positive exponents.
Solution:
We have,



Using properties of exponents, we get
![\left[\because a^{-n}=\dfrac{1}{a^n}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbecause%20a%5E%7B-n%7D%3D%5Cdfrac%7B1%7D%7Ba%5En%7D%5Cright%5D)
Therefore, the required answer is
.
Answer:
5/4
Step-by-step explanation:
To do this you must know that by definition secant is:

Furthermore:

Based on this information we know that 3 = opposite and 5 = hypotenuse. Assuming this is a right triangle we can determine the adjacent side by Pythagorean Theorem.

Where c is the hypotenuse, a is adjacent and b is opposite. Therefore,

And so the adjacent side of this triangle is 4. Going back to the definition of secant we can now know that:

Since the total is 42 divide by two since they are the same length so it would be 21