Consider the curve given by the equation xy2+5xy=50. It can be shown that dxdy=x(2y+5)−y(y+5). Write the equation of the vertical line that is tangent to the curve.
Q. Consider the curve given by the equation xy2+5xy=50. It can be shown that dxdy=x(2y+5)−y(y+5). Write the equation of the vertical line that is tangent to the curve.
Set Denominator Equal to Zero: To find the vertical tangent, we need to set the denominator of the derivative equal to zero because the slope of a vertical line is undefined, which corresponds to an infinite or undefined derivative.
Solve for y: Set the denominator of the derivative equal to zero and solve for y: x(2y+5)=0Since x cannot be zero (as it would make the entire original equation 0=50, which is false), we must have:2y+5=0
Substitute Back and Solve: Solve for y:2y=−5y=−25
Clear Fraction and Simplify: Now we substitute y=−25 back into the original equation to find the corresponding x-values: x(−25)2+5x(−25)=50
Combine Like Terms: Simplify and solve for x:x(425)−(225)x=50Multiply through by 4 to clear the fraction:25x−50x=200
Find x: Combine like terms: −25x=200
Equation of Vertical Line: Solve for x:x=−8
Equation of Vertical Line: Solve for x:x=−8The vertical line that is tangent to the curve at the point where y=−25 will have an x-coordinate of −8. Therefore, the equation of the vertical line is:x=−8
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