Question

Consider the arithmetic sequences 5,7,8........... a)what is the common difference?
b)What is its algebraic form?
c)Add 4 to the sum of first three terms.
d)What is the sum of n terms ?
e)Prove that the sum of any numbers of terms in this sequence starting from the first term added to 4 gives a perfect square?
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Answer 1

Answer:

a)7-5=2 this is the answer of first