Question

Find the 12 terms of the AP with 1st term and d=10​

Answer 1

Answer:

To find the number of terms in an arithmetic sequence, divide the common difference into the difference between the last and first terms, and then add 1.

Step-by-step explanation:

The general form of an Arithmetic Progression is a, a + d, a + 2d, a + 3d and so on. Thus nth term of an AP series is Tn = a + (n - 1) d, where Tn = nth term and a = first term. Here d = common difference = Tn - Tn-1. The sum of n terms is also equal to the formula where l is the last nth Term of an AP. The nth term of an arithmetic progression whose first term is a1 and whose common difference is d is given by an = a1 + (n – 1) d..

Answer 2

Answer:

Given:

a=10

d=10

therefore the ap is a, a+d,a+2d,.....a+11d

                                 10, 20,30,40,50,60,70,80,90,100,110,120.....

Proof:

a12= a+ 11d

      =10 +11(10)

       =10+110

        =120