Untitled

lambda <- 1/6

eks <- function(x, lambda) (lambda * exp((-1) * lambda * x))
cdfexp <- function(x, lambda) {
  pdf <- function(t) {
    lambda * exp(-lambda * t)
  }
  hasil <- integrate(pdf, lower = 0, upper = x)
  return(hasil$value)
}
eks(4, lambda)          # 0.08556

## [1] 0.08556952

cdfexp(4, lambda)       # 0.4865829

## [1] 0.4865829

uniform<-function(x,a=0,b=1){1/(b-a)}
uniform(6,a=2,b=10)

## [1] 0.125

norm = function(x,miu,sigma){1/(sigma*sqrt(2*pi))*exp(-1/2*((x-miu)/sigma)^2)}
norm(4,5,1)

## [1] 0.2419707

dnorm(4,mean=5,sd=1)

## [1] 0.2419707