Two distinct concentric circles never intersects each other . Hence it does not have any solutions. As we know that the two parabolas intersect at a maximum of Two Points.
<span> To get an explicit formula, we need to find an expression which gives the n-th term without having to compute earlier terms in the sequence. Looking at the numbers, and from the recursive formula, we see that the sequence is built by subtracting n from the previous term. This is similar to the triangular number sequence 1,3,6,10,15,... which has the explicit formula a_n = n(n+1)/2. In our case we are subtracting n from the previous term, so we multiply by -1/2 instead of 1/2. However, we also need to add a constant term to reproduce the numbers of the sequence. We can write a_1 = -1(2)/2 + c = 8. Therefore, c = 9.
So the explict formula is:
a_n = -n(n+1)/2 + 9</span>
Answer:
pippin i believe
Step-by-step explanation:
Answer:
3 years cause 4800-7% interest
Answer:
1 1/3
Step-by-step explanation:
1/3+1/3+1/3+1/3 is 1 and 1/3 cups