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What does "f of" mean in math? For example, f(x)=2x+6. What does f(x) mean? What is the finial temperature of water if 175g steam at 150 Celsius losses 423kj energy? Could someone please help find inequalities? (LPP) I'm supposed to find how many pharm. and techn. are needed to minimize the costs. Thanks? Glycoproteins are proteins modified with sugars. Which amino acid residues are sugars commonly linked to? How to Expand e^x and ln(1+x) as a power series and hence show that e^x / ln(1+x) = x + (x^2)/2 + (x^3)/3?