It is not possible to calculate a numerical value of ea if you have only found one term in the series expansion, due to which the statement given in the question is false
In mathematics, a function is expanded into a series, also referred to as an infinite sum. It's a method for computing functions that can't be represented by only utilising fundamental operators (addition, subtraction, multiplication and division).
The Taylor series can be used to calculate the value of the entire function at each point if the value of the function and all of its derivatives are known at one point.
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