Question

write the formula used to find sum of 'n'term of an AP​

Answer 1

n/2[2a + (n – 1)d]

is answer

hope it helps you

Answer 2

Answer:

a,a+d,a+2d,a+3d,a+4d,.........a+nd

are in "AP"

Step-by-step explanation:

formula for n-terms of an ap is

= a+(n-1)d

answer of your question