Question

If 3,2x+1,11 are in AP fins x

Answer 1

Answer:

WE KNOW THAT THEY ARE IN AP

SO, SUM OF FIRST AND LAST BY 2 IS EQUAL TO MIDDLE

SO, 3+11/2 = 2X+1

==> 14/2 = 2X+1

==> 7-1  = 2X

==> 6 = 2X

==> X=3

ANSWER = 3