Question

What is the formula for the arithmetic sequence of the sum of the same sequence is given by Sn= 2n+3n²

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Answer 1

Answer:

S = n[a+(n-1/2)d] or

S = n/2[2a + (n+1)d]

where a is first term ,"d " common difference ,"n" number of terms

Step-by-step explanation: