Question

the 7th term of an A.P is -4 and its 13th term is 62.Find the A.P.
plz urgent hai​

Answer 1

Answer:

The A. P. is - 70,-59,-48,-37,-26,-15,-4.....

Step-by-step explanation:

Formula for nth term of an AP is a+(n-1)d

Where a is the first term, n is the required term and d is the common difference

Now, 7th term is - 4

Therefore, a+(n-1)d= - 4

a +(7-1)d = - 4

a+6d = - 4--------(i)

And 13th term is 62

a+(13-1)d = 62

a+12d=62-------(ii)

Subtracting equation (i) from (ii), we get

6d=66

d=11

Substituting &d=11 in equation (i), we get

a+6(11)=-4

a=-70

Therefore the progression will be as follows : - 70,-59.....-4........