Expression 2: "g" left parenthesis, "x" , right parenthesis equals Start sum from "n" equals 0 to "a" , end sum, StartFraction, "x" Superscript, "n" , Baseline Over "n" ! , EndFractiongx=a∑n=0xnn!
2
Expression 3: "a" equals 0a=0
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2020
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Expression 4: "g" left parenthesis, "x" , right parenthesis minus "f" left parenthesis, "x" , right parenthesisgx−fx