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Using the tangent line at x = 25, what is the linear approximation of sqrt(26)?
A5.1
B5.2
C5.01
D4.9
Answer & Solution
Correct answer: A. 5.1
sqrt(25) = 5 and the slope 1/(2 times 5) = 0.1 times a change of 1 gives about 5.1.
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