Question

7. Find n, if the nth term of an A.P.
1,21/11,31/11,41/11,...., is 171/11.​

Answer 1

1,21/11,31/11,41/11,51/11

Answer 2

Step-by-step explanation:

a=1, d=21/11-1=21-11/11=10/11. an=171/11.

$an = a + (n - 1) \times d$

171/11=1+(n-1)10/11

171/11=11+(n-1)10/11

171(11)/11=11+(n-1)10

171-11=(n-1)10

160/10=n-1

16+1=17=n.

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