C-09-Q123mediumsingle_mcq(পাঠ্যবই) x,y,z≠0x, y, z \neq 0x,y,z=0, ax=by=cza^x = b^y = c^zax=by=cz এবং b2=acb^2 = acb2=ac হলে নিচের কোনটি সঠিক?a1x+1z=2y\dfrac{1}{x} + \dfrac{1}{z} = \dfrac{2}{y}x1+z1=y2b1x−1z=2y\dfrac{1}{x} - \dfrac{1}{z} = \dfrac{2}{y}x1−z1=y2c1x+1z=1y\dfrac{1}{x} + \dfrac{1}{z} = \dfrac{1}{y}x1+z1=y1d1x+1y=2z\dfrac{1}{x} + \dfrac{1}{y} = \dfrac{2}{z}x1+y1=z2