Recent content by MrJamesta

I found 0=a+b+c+d 4=8a+4b+2c+d

Oh, it's an x intercept.

That f(x) is continuous at that specific point?

Homework Statement determine the constants a,b,c, and d so that the function f(x)=ax^3+bx^2+cx+d has its first derivative equal to 4 at the point (1,0) and its second derivative equal to 5 at the point (2,4) Homework EquationsThe Attempt at a Solution I found the first and second derivative...

Thanks! Got it now.

Homework Statement Find the points on the curve xy^2+x^2y=16 when the tangent line is horizontal The attempt at a solution I found the derivative of the curve -(y(2x+y))/(x(x+2y)) then I found what values of y make the derivative equal 0 y=0,-2x Then I went to plug into the original curve to...

Thank you very much, I was able to solve the question. And yes, it was just a rectangular box.

Homework Statement A package sent by a courier has the shape of a square prism. The sum of the length of the prism and the perimeter of its base is 100cm. Write a polynomial function to represent the volume V of the package in terms of x. width and height are in x centimeters, length is in y...