Asked by Dakotah
Consider the curve in the xy-plane defined by (x^2) − ((y^2) / (5))=1. It is known that dy/dx=(5x)/y and d^2y/dx^2= −25/(y^3). What is true about the curve in Quadrant IV?
Is it concave up or down and why?
Is it concave up or down and why?
Answers
Answered by
oobleck
well, first off you know that this is an ellipse with center at (0,0), which makes it concave up everywhere below the x-axis.
Since y" > 0 when y < 0, the same holds true.
Since y" > 0 when y < 0, the same holds true.
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