Question

Find the value of the middle term of the A.P -6,-2,2,-.....,58. *

Answer 1

Step-by-step explanation:

Answer is given in the picture

Answer 2

here, a = -11,d= -7-(-11) = 4,an = 49

we have an = a + (n-1) d

so ,49=-11 +(n-1) ×4

i.e., 60=(n-1) ×4

i.e., n=16

as n is an even number , there will be two middle terms witch are

(16/2)th and (16/2+1)th

i.e., the 8th term and 9th trem

a8 = a + 7d = - 11 + 7 × 4 = 17

a9 = a + 8d = - 11 + 8 × 4 = 21

so, the value of the two middle most trem of 17 and 21 , respectively...