We have to solve the system of equations by Cramer's rule.
The coefficient matrix is given by
Let us find the determinant of coefficient matrix.
For X-matrix
Now, we find its determinant
For Y-matrix
Now, we find its determinant
Therefore, the value for x is given by
The value for x is 5.
Answer:
<u>The area of a circle is pi times the radius squared.</u>
<u>-----------------------</u>
<u>hope it helps...</u>
<u>have a great day!!</u>
Given:
The sequence is
436, 218, 109, 54.5, 27.25,...
To find:
The explicit formula for the given sequence.
Solution:
We have,
436, 218, 109, 54.5, 27.25,...
It is a GP because the two consecutive terms have common ratio.
Here,
First term : a=436
Common ratio : d =
=
=
Now, the explicit formula for a GP is
Where, a is the first term and r is the common ratio.
Putting a=436 and r=0.5, we get
Therefore, the correct option is c.