Find the linear approximation of the function
f(x) = sqrt of (1 − x) at a = 0. Use L(x) to approximate the numbers sqrt of 0.9
and sqrt of 0.99.
.

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I already found L(X) = -1/2X + 1. Idk what do do after that.

\[\sqrt{1-x} \approx \frac{-1}{2}x+1\]
\[\sqrt{0.9}=\sqrt{1-0.1} \approx \frac{-1}{2}(0.1)+1\]

Srry but where did u get sqrt of 1-0.1 from if x = 0.9

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