Question

The $$n$$th term from the end of an A.P. whose first term, last term and common difference are $$a$$, $$l$$ and $$d$$ respectively, is given by:

Options

• $$l + (n + 1)d$$

• $$l - (n - 1)d$$

• $$l + (n - 1)d$$

• $$l - (n + 1)d$$

Answer 1

l – (n – 1)d

Explanation:

Counting backward from the last term, the nth term from the end is $$l - (n - 1)d$$.