if the pth term of an A.P. is x and qth term is y, show tht the sum of `(p+q)` terms is `(p+q)/2[x+y+((x-y)/(p-q))]`

The pth term of an A.P.is a and qth term is b Then find the sum of its (p+q) terms.

If the p^(th) term of an A.P is q and q^(th) term is p, prove that its n^(th) term is (p+q-n)

If the pth term of an A.P. is q and its qth term is p then its mth term is :

The pth and qth terms of an A.P. are x and y respectively. Prove that the sum of (p + q) terms is. (p+q)/(2)[x+y+(x-y)/(p-q)].

The p^(th) term of an A.P.is a and q^(th) term is b . Prove that the sum of its (p+q) terms is (p+q)/(2){a+b+(a-b)/(p-q)}

the pth term of an A.P is q and and the qth tern is p find the mth term.

If the pth term of an A.P. is q and the qth term isp, then find its rth term.