Question

A.P 4,7,10,13 find the sum of 12th term​

Answer 1

Step-by-step explanation:

a = 4

a2 = 7

d = a2-a = 3

a12 = a + 11 d

= 4+11X3

= 4+33

= 37

12th term is 37

Answer 2

Answer:

Here Given :

A. P. = 4, 7 ,10, 13.

first term (a) = 4

d(common difference) = 7-4= 3

n= 12

now, a12 = a + 11d

= 4+ 11*3

=37

Therefore the required answe is 37

____________________________________________

Sn= n/2[ 2a+(n-1) d]

= 12/2[2*4+(12-1) 3]

= 6[8+ 11(3) ]

= 6[8+33]

= 6[41]

= 246.

Therefore,the sum terms of the A. P is 246