Question

The 10th term from the end of the A.P. -5, -10, -15,…, -1000 is (a) -955 (b) -945 (c) -950 (d) -965

Answer 1

Answer:

The given question is solved in the uploaded photo.

Extra information-

mth term from the end of an ap containing n terms is (n-m+1)th term from beginning.

The simplest way to do this is to assume last term as the first term and find nth term from the end of AP.

That is , l=-1000

d=5 and n=10

Now,

l10=l+(n-1)d= -1000+(10-1)5=-955(ans)

Hence the given question is solved in two ways