Exercise 4.2.14 let a ⊆ r, let f : a → r, and let c ∈ r be a cluster point of a. if limx→c f exists, and if |f| denotes the function defined for x ∈ a by |f|(x) : = |f(x)|, prove that limx→c |f| = limx→c f .

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step-by-step explanation:

answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°

so ac is the half of 24=12ft,and from the pythagorean theorem we find ba

ba=√bc^2-ac^2=√576-144=√432=12√3ft

so bac is 12+12√3=12(1+√3)ft

i believe it is 0.1m because the measurement of 30.4m limits how precise you can be

you can only be as precise as the least precise measurement

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