If the sum of first p terms, first q terms and first r terms of an A.P

1.	If the sum of first p terms, first q terms and first r terms of an A.P. be a, b and c respectively, Then ap(a - r) + bq(r - p) + cr(p - q) is equal to
Answer» If the sum of first p terms, first q terms and first r terms of an A.P. be a, b and c respectively, Then $\frac{a}{p}$ (a - r) + $\frac{b}{q}$ (r - p) + $\frac{c}{r}$ (p - q) is equal to

If the sum of first p terms, first q terms and first r terms of an A.P. be a, b and c respectively, Then ap(a - r) + bq(r - p) + cr(p - q) is equal to

Answer»

If the sum of first p terms, first q terms and first r terms of an A.P. be a, b and c respectively,

Then $\frac{a}{p}$ (a - r) + $\frac{b}{q}$ (r - p) + $\frac{c}{r}$ (p - q) is equal to