Evaluate

If x,y,z be respectively the p^th, q^th and r^th term of G.P., then evaluate

(q-r) logx + (r-p) logy + (p-q) logz

For the statement p and q, consider the following compound statements:

B. {(pvq)^-p} → q

Then which of the following statement is correct:

(i) A is a tautology but not B

(ii) A and B both are not tautologies

(iii) A and B both are tautologies

(iv) B is a tautology but not A

Evaluate

a)