Quote:
Originally Posted by who716
invERF[( 33-2x13+2)/(1.07*33)]X(10/(invERF 1/1.07)+12) 13. ....... rounded up to nearest whole integer =14
remember inverse is the same as going to the power of -1 if you don't have a calculator with the function already...
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The inverse of a function f(x) is not 1/f(x).
The inverse of f(x) is g(x), such that g(f(x))=x
For example, the inverse of f(x)=x
2 is g(x)=sqrt(x), not 1/x
2
Code:
octave-3.6.4.exe:10> erfinv(0.33)
ans = 0.301332146133706
octave-3.6.4.exe:11> 1/erf(0.33)
ans = 2.78335488667249
I will never forget Dean's opening lines: "I want you to know that I am here under protest. I believe that everything you are doing here is repugnant and ethically wrong. And now I am going to tell you why..." And for the next 35 minutes, that is exactly what he did. - dlavery [more] 
10-03-2015, 17:56
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