Equality of Lagrange Bound and Actual Error
For which of the following functions is the Lagrange error bound for the 2nd-degree Taylor polynomial centered at x = 1 equal to the actual error when approximating f(1.2)?
A
f(x) = ln(x)
B
f(x) = e^x
C
f(x) = sin(x)
D
f(x) = x³
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