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Leigh A.

asked • 10/29/13

Please help me with a few questions I don't understand from my homework. Thank you!

1. If a>0, show that the function f(x)=(x^5)+ax-1 has precisely one real root.
 
2. Find the critical points and apply the second derivative test (or state that it fails).
(a) f(x)=(sin^2)x+cosx, 0<x<pi
(b) f(x)=(e^-x)-(4e^-2x)

1 Expert Answer

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Andre W. answered • 10/29/13

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Leigh A.

Thank you! Do you think you could help me with the rest of them since no one else answered them?
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10/30/13

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