Question

If a,b,c are in ap (arithmetic progression) then prove that..?

b+c,c+a,a+b are in ap 

b+c-a,c+a-b,a+b-c r in ap 

1/a(1/b +1/c), 1/b(1/c +1/a), 1/c(1/a + 1/b) r in ap 

a*a(b+c),b*b(c+a),c*c(a+b) r in ap

Answer 1

this is answer............