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March 26, 2015

March 26, 2015

Posted by **Anonymous** on Sunday, April 7, 2013 at 4:32pm.

Find a formula for the fourth degree polynomial p(x) whose graph is symmetric about the y-axis (meaning it has no odd powers of x), and which has a y-intercept of 0, and global maxima at (4,512) and (−4,512).

- Calc -
**Steve**, Sunday, April 7, 2013 at 6:14pmp has maxima at 4,-4 and is 3rd degree, so

p'(x) = ax(x^2-16)

= 4ax^3 - 64ax

p(x) = a x^4 - 32ax^2

= a (x^4 - 32x^2)

p(4) = 512, so a = -2

p(x) = -2x^4 + 64x^2

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