Linear approximation / tangent approximation (L(x) = f(a) + f'(a)(x−a) approximates f(x) near a)
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L(x) = f(a) + f'(a)(x−a) approximates f(x) near a
What each symbol means
| Symbol | What it stands for |
|---|---|
| a | Base point |
| L(x) | Tangent line value |
When to use this
f differentiable at a; x close to a for good approximation.