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The final equation for the linearization of a function at <math>x = a</math> is:
<math>y = (f(a) +
For <math>x = a</math>, <math>f(a) = f(x)</math>. The [[derivative]] of <math>f(x)</math> is <math>f'(x)</math>, and the slope of <math>f(x)</math> at <math>a</math> is <math>f'(a)</math>.
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