Let be the outcome of throwing a pair of fair dice. What is the probability for which exists and is finite?
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l i m x → 0 x b ln ( ( cos ( x ) ) a ) = l i m x → 0 x b a ln ( ( cos ( x ) ) )
Let us Now Apply L'Hôpital's Rule
l i m x → 0 b x b − 1 − a tan ( x ) = l i m x → 0 x tan ( x ) b − a x b − 2 1
= l i m x → 0 b − a x b − 2 1
Now for Limit to be Finite
b − 2 = { 0 , − 1 , − 2 , − 3 , − 4 . . . . . . } b = { 2 , 1 , 0 , − 1 , − 2 , − 3 . . . . . . }
But b can Only be b = { 2 , 1 } as it is an outcome of a Dice.
Now probability is P = T o t a l N o o f w a s t o s e l e c t " a " N o o f w a s t o s e l e c t " a " . T o t a l N o o f w a s t o s e l e c t " b " N o o f w a s t o s e l e c t " b " P = 6 6 6 2 = 3 1 = 0 . 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3