Prove that Log(2) is discontinuous on R, the nonpositive real axis.

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a. Find the linearization of the function f(x) = √x at 9. b. Use the linear approximation obtained in part (a) (no other methods) to approximate √9.2. Your answer based on that linearization can be given either as an exact fraction or rounded to four digits after the decimal point.

I hope that it is solved in an easy and clear handwriting because I do not speak English well