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# If x , y , z are in GP then , $\;\large\frac{1}{x^2-y^2}+\frac{1}{y^2}\;$ equals

$(a)\;\large\frac{1}{z^2-y^2}\qquad(b)\;\large\frac{1}{y^2-z^2}\qquad(c)\;\large\frac{1}{z^2-x^2}\qquad(d)\;\large\frac{1}{y^2-x^2}$