Question

explain the terms Sn=n/2[2a+(n-1)d]​

Answer 1

Answer: It is the formula for Sum of 'n' terms.

Step-by-step explanation:

S = sum

n = number of terms

a = first term

d = common difference

Hope this helps!!

Cheers! Mark as brainliest!

Answer 2

Answer:

Sn = sum of the 'n' terms.

n = number of terms.

a = first term.

d = common difference

To find the common difference=

d = a2 - a1 = a3 - a2

I hope it will help you mate!