How would I solve these 3 limits? All three are x->0 which gives 0/0. I m just having trouble with the algebra. 1. [(X+deltaX)^2 - X^2]/deltaX. Not sure what to do after expanding the top. 2. [(1/x+5)-(1/5)]/X. Eww complex fractions 3. [Sq. Rt of (16+X) -4]/X. Not sure how to go about rationalizing...

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