Find the Indicated Terms in Each of the Following Sequences Whose Nth Terms Are An = N (N −1) (N − 2); A5 And A8 - Mathematics

Find the indicated terms in each of the following sequences whose nth terms are

an = n (n −1) (n − 2); a5 and a8

Solution

Here, we are given the nth term for various sequences. We need to find the indicated terms of the A.P.

an = n (n −1) (n − 2)

We need to find a_5 and a_8

Now to a_5 term we use n = 5 we get

a_5 = 5(5 -  1)(5 - 2)

= 5(4)(3)

= 60

Also to find a_8 term we use n = 8 we get

a_8 = (8(8 - 1)(8 - 2))

= 8(7)(6)

= 336

Thus a_5 = 60 and a_8 = 336

Is there an error in this question or solution?

APPEARS IN

RD Sharma Class 10 Maths
Chapter 5 Arithmetic Progression
Exercise 5.1 | Q 2.3 | Page 5