Question

If the A.P. is 1 + 2 +3 +4 + ........., then the sum of its n terms is,​

Answer 1

Answer:

n

Step-by-step explanation:

a = 1

d = 1

then

an = a + (n-1) d

an = 1 + ( n - 1 ) 1

an = 1 + n -1

an = n th term