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R is the real nmbers

so letAbe inR

letf: A -> Rbe such thatf(xfor all)>0xin A

cis inA

Does any one know the proof to or even get me started on this proof shown below

[It's hard to write roots on the computer, so I will use the 1/2-th power instead.] SO i want to prove the following

PROVIDED f(x) > 0

lim x ->c [f(x)^(1/2)] = [lim x->c f(x)]^(1/2),

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# Sqareroot limit proof

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