Question

a,a+d,a+2d.......l and n terms of an A.P. find ( n-1)th term of it in term of 'l'

Answer 1

Answer:

L - d

Step-by-step explanation:

L = a + (n-1)d

N-1 term = a + (n-2)d

= a + (n-1)d - d

= L - d