What is compodendo and dividendo

1.	What is compodendo and dividendo
Answer» If 4 numbers are proportion then it is written as a/b = c/d By componendo , we have (a+b)/b = (c+d)/dBy dividendo , we have (a-b)/b = (c-d)/dAnd by componendo and dividendo , we have (a+b)/(a-b) = (c+d)/(c-d).

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