Question

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

Answer 1

Answer:

4 is the answer mate okay okay

Answer 2

Answer:

this answer is by logic

(n-1)th term = l-d

and...

by solving

L=a+(n-1)d ie a= L-(n-1)d

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

= L-(n-1)d + (n-2)d

= L -dn +d +dn -2d

= L-d, final answer

hope this will help you