Question

find the term of A.P whose first term is 7 and 8th term is 49​

Answer 1

Answer:

a=7

a8= 49

we know that,

a8= a+7d

:- put the value of a is here.

:- 49 = 7+7d

:- 49-7= 7d

:- 42= 7d

:- d = 42/7

:- d = 6

Now,

a2= a+d

=} 7+6 = 13

a3= a+2d

=} 7+2×6

=} 7+12= 19

Hence;

AP: 7,13,19,...... so on.

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