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Q1.Express the following functions e.g u=f(1,m) in differential form u = 12 – m² Q2. (a) $ = $(a, b) da (a=ao,b=bo) da da (a=ao+8a,b=Db.) (b) f(u) d? du? |(u=uo+8u) d?w du? |(u=uo) Su 1