Question

the two arithmetic mean between-6and14

Answer 1

Let the terms be – 6, a, b 14 
a = – 6 
T4 = a + 3d = 14 
– 6 + 3d = 14 
3d = 20 
d = 20/3 
a = – 6 + 20/3 = 2/3 
b = 2/3 + 20/3 = 22/3 

Answer 2

let the terms -6 and 14 be a and b
arithmetic mean=a+b/2
-6+14/2=8/2=4