Question

Find the seventh term 7,10,13.....184

Answer 1

hello Frnd

Since it is an A.P

a = 7

d = 10 - 7 = 3
Since we have to find 7th term

and n = 7

The formula for the nth term is
an = a + ( n -1) d
where a = first term of an AP
d = common difference
and n = term to be find.

a7 = 7 + (7 -1)3

= 7 + 18

= 25

hence the 7th term is 25.

hope it helps
#jerri

Answer 2

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

a = 7,d = 10 - 7 = 3.

We know that sum of n terms of an AP = a + (n - 1) * d

                              The 7th term of an AP = 7 + (7 - 1) * 3

                                                                    = 7 + 6 * 3

                                                                    = 7 + 18

                                                                  = 25.

Therefore the 7th term = 25.


Hope this helps!