Recent content by quadreg

  1. Q

    Why do others think I should be more open minded .

    You can't always simply just look at evidence. For instance how do you prove, or find evidence that spirituality does not exist? On a side note, natural medicine that works is simply called medicine.
  2. Q

    Why do others think I should be more open minded .

    In science theories and assertions are based on evidence, physical or theoretical, which is rational, generally/from experience being 'open minded' is not. For instance if I told you homeopathy was better than penicillin for treating bacterial infection, or even that homeopathy works at all...
  3. Q

    Why do others think I should be more open minded .

    Often it's not that they've made an effort to impose their unfounded/disproven ideas on me, it's more the other way round but they won't subside to reason. It's a shame natural selection is predicated on ability or procreate, not intelligence.
  4. Q

    Why do others think I should be more open minded .

    Why do others think I should be more "open minded". I'm often told I should be more "open minded", often in regards to things such as natural medicine or spirituality. Personally I think "open mindedness" is completely irrational, and those who are, are a blight on humanity that need to be...
  5. Q

    Prove algebraically that lim x->0 (x^2)*cos(1/ x^(1/3)) does not exist

    Out of curiosity is it possible for there to be more than one limit, given there's more than one root, whether the limit exists or not.
  6. Q

    Prove algebraically that lim x->0 (x^2)*cos(1/ x^(1/3)) does not exist

    Isn't the domain of x^{1/3} , include all ℝ, you can take the cube root of a negative can't you. eg. \sqrt[3]{-125}=-5
  7. Q

    Prove algebraically that lim x->0 (x^2)*cos(1/ x^(1/3)) does not exist

    so I get −1≤cos(\frac{1}{\sqrt[3]{x}})≤1 −x^{2}≤x^{2}cos(\frac{1}{\sqrt[3]{x}})≤x^{2} so as x -> 0 bounds -> 0, so the limit is 0. however wolfram alpha tells me otherwise...
  8. Q

    Prove algebraically that lim x->0 (x^2)*cos(1/ x^(1/3)) does not exist

    is it sometimes referred to as the squeeze theorem
  9. Q

    Prove algebraically that lim x->0 (x^2)*cos(1/ x^(1/3)) does not exist

    Even when I try to show that the limits are different either side of zero I keep getting divisions by zero.
  10. Q

    Prove algebraically that lim x->0 (x^2)*cos(1/ x^(1/3)) does not exist

    Homework Statement Prove algebraically that lim x->0 (x^2)*cos(1/ x^(1/3)) does not exist Homework Equations lim x->0 (x^2)*cos(1/ x^(1/3)) The Attempt at a Solution I know the limit does not exist but can't prove it algebraically.
  11. Q

    Girls in Engineering-Relationships

    Lower your standards, one 10 is equal to ten 1s.
  12. Q

    Prove f(x) = x^3 + 3^x is a one-to-one function.

    Ohh, that makes sense. 3x^2 is always >=0 and (3^x)ln3 is always >=0, so f'(x)>0. Thankyou.
  13. Q

    Prove f(x) = x^3 + 3^x is a one-to-one function.

    Yes, I tried solving for critical points, but i get f'(x)=3x^2+(3^x)ln3 and can't solve for x where f'(x) = 0
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