SOLUTION: What is the difference between 200th and 300th term of the sequence 1,3,7,15.....?and how to solve it

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Question 604635: What is the difference between 200th and 300th term of the sequence 1,3,7,15.....?and how to solve it
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
the differences between terms is doubling, so a power of 2 is involved

where n is the number of the term, Tn = (2^n) - 1