Your answer is A hope this helps
Answer:
Step-by-step explanation:
This is a geometric series with the common ratio and the first term .
An explicit formula of the n-th term of a geometric sequence:
Substitute:
<span>5/13 + 7/13 = 12/13 < 1
5/12 + 7/12 = 12/12 = 1
5/11 + 7/11 = 12/11 > 1
Hope this helps.</span>
Answer:
4. 1/2. 3. -4/5
Step-by-step explanation: