I'm guessing the sum is supposed to be
Split the summand into partial fractions:
If , then
If , then
This means
Consider the th partial sum of the series:
The sum telescopes so that
and as , the second term vanishes and leaves us with
Answer:
C should slot on top of A.
Then D should slot in next to C of the left.
Lastly B should be beneath D and on the left of A.
Hope that makes sense.
Answer: i think it's the last option
15
Step-by-step explanation:
The answers to the questions