Recent content by chessmath

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    Find value of a and b such that F(x) is a valid cumulative distribution function

    Hi I have a question , the question asks find value of a and b such that F(x) is a valid cumulative distribution function? 1-a*exp(-x/b) x≥0 F(x)= a*exp(x/b) x<0 My attempt to solve the problem: I know F(x) when x goes to ∞ in 1 and when x goes to -∞ is...
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    Solve Fourier Coefficients: Find Fn If f[t+T/2]=f(t)

    Problem is solved.Thanks. is there anyway to mark post as solved or answered.
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    Solve Fourier Coefficients: Find Fn If f[t+T/2]=f(t)

    How? First change f(t)=f(t+T/2) and then calculate Fourier coefficient?
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    Solve Fourier Coefficients: Find Fn If f[t+T/2]=f(t)

    Hi I am dealing with problem that says f(t)=ƩFn.exp(inwt) . f(t)=f(t+T) show that if f(t)=f[t+T/2) then Fn is zero for odd n? Attempt: I wrote formula for Fn=1/T∫f(t).exp(-inwt) and then just replace f(t) by f(t+T). but I do not get anything, I do not know how I should approach this problem...
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    Finding the Norton Equivalent Circuit in a Short Circuited Circuit

    Hi Can you please tell me how to find the Norton Equivalent or I should say the short circuit current in the attachment diagram? Norton resistance using two different methods but now question asks me to find resistance by dividing voltage of open circuit which I figure it out over current...
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    Definite integral to indefine one

    Hi I would like to know what is the procedure to convert indefinite integral to definite one? For example I know ∫exp(-u^2)du from 0 to x is equal to ∫x*exp(-x^2*t^2)dt from 0 to 1 But I would like to know with what type of change of variable I get these?
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    Undergrad Electric field of line of charge

    You are right. But there is second argument that says electrif field is defined in the surronding of line of charge or point charge and not on itself. that's why it is undefined.
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    Undergrad Electric field of line of charge

    it is the integral of 1/x^2 from 0 to L/2. meaning that putting value of 0 make the integral infinity.
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    Undergrad Electric field of line of charge

    Because electric field is defined in the area around line of charge not on the line of charge.2- when you take integral you get infinity meaning that it is not defined.
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    Undergrad Electric field of line of charge

    You can clearly see point B is the middle of line of charge with length L. so now question is what is field at this point?
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    Undergrad Electric field of line of charge

    Hi Is electric field zero or undefined?
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    Undergrad Is ∫1/x^2 - ∫1/x^2 from 0 to 2 Zero or Undefined?

    Hi I would like to know what is ∫1/x^2-∫1/x^2 from 0 to 2.is it zero or undefined meaning that it is infinity ? (because each integral is undefined at zero).
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    Graduate Is the Dirac Delta Function of x^2 Equivalent to Delta of x?

    Hi I would like to know what is the dirac delta function of x^2, I read somewhere it is equal to delta of x itself but why?
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    Check to see whether it is time invariant or not?

    Hi the problem that I am dealing with is to check whether y[n]=T{x[n]}=x[kn] time invariant or not? My solution is I said z(n)=T{x[n-A]}=x[k(n-A)] and y[n-A]=x[k(n-A)] and because y[n-A]=z(n) so it is time invariant but solution is saying that it is time varying because...
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    Undergrad Findind Area element in Cylindrical Coordinate System

    Thanks I know rdrdθ is a valid statement but what about other area element, you got something that both depends on cosθ and sin but we know area element in the θ direction is just drdz. how can I calculate those? Thank you.