Question

You wish to estimate e^x where |x|<2. The Lagrange error terms suggests that you use a Taylor polynomial at 0 with degree n .
What is the least value of n ?

I know that the Mclaurin series of e^x is just

1+x+x^2/2!+... but I'm not familiar with the
"Lagrange error term"

Answer 1

Estimate suggests linear approximation, is there more info to the question?