mahmit2012
Draw the curve.
y=1+x^2+sqrt(1x^2)



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mahmit2012
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mahmit2012
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mahmit2012
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mahmit2012
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for considering sign of y' you can choose some numbers and put in y' equation.
for example x=+1/2 or something like that
y'(1/2)>0 and so on clear?

mahmit2012
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Stacey
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Excellent work! That is correct.