Question

Find the 15th term from the last of the AP 4,9,14 ...254

Answer 1

Answer:

here a=4 and d=5

last term is 254

now 254=a+(n-1)d

or 254=4+5n-5

or 254=5n-1

or n=255/5=51

Now the 15th term from the last of sequence will be 51-15=36th term from first of the sequence.

Now 36th term=4+(36-1)5

or 36th term=4+175=179

or 15th term from last is 179.

If my answer satisfies you then give me thanks.