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:
Step-by-step explanation: 100 divided by 20 is 5 therefore, each question is worth 5%. take how many questions she got right and multiply by 5. then determine if her score is less than or greater then 90%.
Step-by-step explanation:
Parallelogram
Reflect y=-1 ;x changes sign
What do you mean what are the solutions to?
I don’t understand the question?
Step-by-step explanation:
That is my answer, luckily I did the test