Question

The 7th term and 17 th term of an A. p.

are 24 and 54 respectively. (Find the 12the term of this A.P.)​

Answer 1

Answer:

39

Step-by-step explanation:

Let the first term be a and common difference be d.

7th term= T7 = a +(7-1)d = a+6d = 24

17th term = T17 = a+(17-1)d = a + 16d = 54

Adding both terms,

a+ 6d + a + 16d = 24 + 54

=> 2a + 22d = 78

=> 2(a+11d) = 78

=> a + (12-1)d = 39

=> T12 = 39

Hence, 12th term is 39

Answer 2

Step-by-step explanation:

thanks this is your answer