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  1. B

    Inequalities help!!!

    I was wondering how I could do this question: If (ad+bc)2 <= (a2+b2)(c2+d2), deduce that: (a+b)2<= 2(a2+b2) Now, I know that I am able to do it without the first property given, but the original question is a HENCE question... so i was wondering how to do it using the property above. I...
  2. B

    Second Derivative Help

    Hey Guys! why cant a point of inflection occur at (d^3y)/(dx^3) = 0
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