Question

Find the middle term in the A.P 20, 16, 12, -----------negative 24

Answer 1

Answer:

Step-by-step explanation:

an = a + (n-1)d

=> -24 = 20 + (n - 1)(-4)

=> -44 = (n - 1)(-4)

=> 11 = n-1    =>  n = 12

So, the middle term must be

n/2 = 6th term

which is,

an = 20 + (6 - 1)(-4)

    = 20 - 20  =  0