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[" (c) "(-e,e)],[" 1.If "phi(x)" is cont...

[" (c) "(-e,e)],[" 1.If "phi(x)" is continuous at "x=alpha" such that "phi(alpha)<0" and "f(x)],[" is a function such that "],[f'(x)=(ax-a^(2)-x^(2))phi(x)" for all "x," then "f(x)" is "],[" (a) increasing in the neighbourhood of "x=alpha],[" (b) decreasing in the neighbourhood of "x=alpha],[" (c) constant in the neighbourhood of "x=alpha],[" (d) minimum at "x=alpha]

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