Asked by marissa
what are the inflection points of 5x^2-45/x^2-25
Answers
Answered by
Damon
what is the numerator and what is the denominator?
Answered by
Steve
assuming the usual sloppiness, we have
y=(5x^2-45)/(x^2-25)
y'= -160x/(x^2-25)^2
y" = 160(3x^2+25)/(x^2-25)^3
since y" is never zero, there are no inflection points, as can be confirmed here:
http://www.wolframalpha.com/input/?i=%285x^2-45%29%2F%28x^2-25%29
y=(5x^2-45)/(x^2-25)
y'= -160x/(x^2-25)^2
y" = 160(3x^2+25)/(x^2-25)^3
since y" is never zero, there are no inflection points, as can be confirmed here:
http://www.wolframalpha.com/input/?i=%285x^2-45%29%2F%28x^2-25%29
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