Question

find the middle term of the A.P =10,7,4,..........-62.​

Answer 1

Answer:

1,-2, -5, -8 -11, -14, -17, -20, -23

Answer 2

Answer:

a=10, d= -3 and an = -62 ( GIVEN )

using an = a+ (n-1)d, we get

-62=10+(n-1)-3

-72=-3n+3

-3n=-75

therefore, n=25

NOW, middle term will be 12 or 13

SO, a12= a+(12-1)d=10+(11)×-3=10-33=-23

AND,

a13= a+(13-1)d=10+(12)×-3=10-36=-26