Question

if an automatic means are inserted between a and b

Answer 1

If u want to insert A. M. then..
Let assume u want insert A1 between A and B..
Then the formula will be...
A + d = A1...
If u want to insert next term means A2 then the formula will be
A+2d=A2
For find out the value of d...
USE THIS...
B is last term so it can be written as..
$a + (n - 1)d = an$
And A is first term...