Question

find the middle term in the ap 20,16,12....(-176).​

Answer 1

Step-by-step explanation:

Taking 20 as first term

. -176 is 50 th term.

Hence middle terms are 25,26 th terms.

Taking 20 as first term,

Common difference =16-20=-4

-176=20+(n-1)-4

-196=-4n+4

-200=-4n

N=50

-176 is 50th term

Hence middle terms are 25,26 th terms

25th term=20+24(-4)=20-96=-76

26th term =20+(25)(-4)=-80