Question

write the formula to find the sum of an arithmetic series if the first term is a and the last term is l​

Answer 1

Step-by-step explanation:

Sn =1/2[a+l]

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Answer 2

$\huge\star{\underline{\underline{\tt{\red{Answer}}}}}\star$

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Formula For the sum of arithmetic series,

Where we have been given elements as:

• First term (a)
• Last Term (l)
• Number of Terms(n)

$\bigcirc$ Sn=$\bold{\large\frac{n}{2} }$[a+l]

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