Meme: "X1= X2+ X3 ∆X1= ∆X2+ ∆X3 δ = ( ∆X2+ ∆X3 ) / (X2+ X3) X1= X2– X3 ...

Meme: "X1= X2+ X3 ∆X1= ∆X2+ ∆X3 δ = ( ∆X2+ ∆X3 ) / (X2+ X3) X1= X2– X3 ...