Question

Calculate in head,the sum of the arithmetic sequence| 1/2+1+1 1/2+2+2 1/2+........+12 1/2​

Answer 1

Step-by-step explanation:

i) :- 1210

ii) :- 84

Sn is denoted as sum of n numbers

Tn is denoted as nth term of the series

d is common difference

a is known as first term

n is number of terms

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