How many terms of the arithmetic sequence 5,7,9,...
1)what is its common difference?
2)what is its algebraic form? 3)Add 4 to the sum of first three terms? 4)what is the sum of first n terms? 5)prove that the sum of any number of terms in this sequence starting from the first term added to 4 gives a perfect square?
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Answer:
2 is the common difference
algebraic form is
a+(n-1)d
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