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For three positive integers p, q, r, x^p q^2 = y^q r = z^p^2 r and r = pq + 1 such that 3,\ 3\log_yx,\ 3\log_zy,\ 7\log_xz are in A.P. with common difference \dfrac12. Then r - p - q is equal to: | Watch the step-by-step video solution for this NIMCET PYQ.