Math, asked by Avirajj2992, 1 year ago

Sum of first n terms of a series is 5n2 + 2n, and then its second term is--

Answers

Answered by Pammy11
10
Use the Arithmetic progression formula
Tn = a ( n - 1 ) d
or
Sn = n / a * { 2a + ( n - 1 ) d }
Answered by Cr187
10

Answer:

17

Step-by-step explanation:

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