Fill in the blanks:
If a,b,c are in A.P., then the straight line ax + by +c = 0 will always pass through the …………..

If non-zero numbers a,b,c are in H.P., then the straight line x/a+ y/b+1/c=0 always passes through a fixed point. That point is :

Fill in the blanks: C_p of a gas is …………than its C_v .

If a,b,c and in A.P, then x^a,x^b,x^c are in:

If a, b, c are in A.P. then 3^a, 3^b, 3^c are in:

If a, b, c are in A.P., then prove that : (a-c)^2 =4(b^2 -ac) .

Fill in the blank of A.P. 18, 13, ………… 3.

Fill in the blank of A.P. -5, -1, ………., 7.

Fill in the blanks The are bounded by the axes and the line y= x+1 is………. .

If a, b, c are in A.P., prove that : b+c,c+a,a+ b are also in A.P.