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 Sep24 awarded Autobiographer May22 comment Constructive proof of a problem from the book Analysis by Terence Tao Have you tried? Feb14 revised Demonstration of a divisibility rule fixed grammer Feb14 suggested approved edit on Demonstration of a divisibility rule Dec27 accepted Expectation of function of random variable? Dec17 comment Simple logarithmic equation Thanks for your valuable comment. In future I will keep in mind. Dec17 comment Simple logarithmic equation actually you have solved the problem I am just providing the end result...He/she was asking about the procedure to solve it algebraically. So if you wish that he /she should work on it then you should start like this.. Let you have $y_1$ for $t_1$ and $y_2$ for $t_2$ using this you obtain two equation and two unknown for example $y_1=Ae^{-kt_1}$ and $y_2=Ae^{-kt_2}$ using these two equations you can find $A=y_1e^{kt_1}=y_2e^{kt_2}$ using this you can obtain $k$ after this either using $A=y_1e^{kt_1}$ or using $A=y_2e^{kt_2}$ you can obtain $A$. Dec17 comment Simple logarithmic equation $k=0.0100128$ $A=19.9965$ Dec17 awarded Commentator Dec17 comment Expectation of function of random variable? Thanks @r.g. for the trivia. Dec17 comment Expectation of function of random variable? I am also not interested in finding the PDF of g(X). The question is How we can find the $E[g(X)]$ without using $f(x)$. Whereas we are having CDF of X i.e. $F_{X}(x)$. Dec16 comment Expectation of function of random variable? g(X) can be any function linear of exponential no further assumptions. Dec16 revised Expectation of function of random variable? added 62 characters in body Dec16 comment what will be the distribution of ratio of correlated gamma distributed random variables? Yes its correct as title says "Ratio of correlated gamma...." because it is ratio of X+C to X+Y where X random variable is related to both numerator and denominator whether X and Y are independent r.v. Dec16 asked Expectation of function of random variable? May22 awarded Nice Question Feb10 awarded Citizen Patrol Oct23 comment Compute the Fourier transform of $f(t) = \sin t$? @ KennyTM: I understood the point. Still I want to know why above answer is downvoted? Oct22 comment what will be the distribution of ratio of correlated gamma distributed random variables? I assumed $S=X+Y$ and find the joint pdf $f_{R,S}(r,s)$. Later, I averaged over S taking limit '0' to 'infinity' and got $f_R(r)$, but not able to find the valid range of R to verify this pdf. Oct22 revised Compute the Fourier transform of $f(t) = \sin t$? edited body