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If X is the random variable with distri...

If X is the random variable with distribution function F(x) given by,
`F(x)={{:(0, x lt 0), (1/2(x^(2)+x), 0 le x lt 1), (1, x le 1):}`
then find (i) the probability density function f(x) (ii) `P(0.3 le X le 0.6)`

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