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Approximate the specified value using each of the polynomials

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2. Use Eq. (3.10) to construct interpolating polynomials of degrees one, two, and three for the following data. Approximate the specified value using each of the polynomials.
a. f(0.43) if f(0)=1,f(.25)=1.64872 f(.5)=2.71828,f(.75)=4.48169
b. f(0) if f(-.5)=1.93750,f(-.25)=1.33203,f(.25)=.800781,f(.5)=.687500

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