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2 answers:
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Answer: 
The first term is a = 2. The common ratio is r = -6. You start off with 2 and multiply each term by -6 to get the next term.
eg: 2*(-6) = -12 ---> -12*(-6) = 72 etc etc
If you want the series summation to go on forever, then replace the 'n' up top with the infinity symbol
Note: Because |r| < 1 is not true (r < 1 in this case), this means that the series diverges.
The first term is a = 2. The common ratio is r = -6. You start off with 2 and multiply each term by -6 to get the next term.
eg: 2*(-6) = -12 ---> -12*(-6) = 72 etc etc
If you want the series summation to go on forever, then replace the 'n' up top with the infinity symbol
Note: Because |r| < 1 is not true (r < 1 in this case), this means that the series diverges.
Answer:
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Work Shown:
Explanation:
In the second step, I multiplied both sides by r to move it to the left side. Then I divided both sides by p to isolate r.
In short, the r and p swap places.