1 , 2 , 1/2( 1+2θ( 1 ) )^2 = √2( 1/A.G.M.( 1 , √2 ) ) ⇒ ( 1+2θ( 2 ) )^2 = ( ( 1+√2 )/2 )( 1/A.G.M.( 1 , √2 ) ) ( 1+2θ( 1/2 ) )^2 = ( ( 1+√2 )/√2 )( 1/A.G.M.( 1 , √2 ) )