Find the next number in the series: 4, 9, 20, | vedclass

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Question

(A) The pattern followed in the series is $x_{n+1} = 2 	imes x_n + n$,where $n$ is the position index starting from $1$.$9 = 2 	imes 4 + 1$$20 = 2 \

Vedclass · Accepted Answer

$185$

Vedclass · Answer

(A) The pattern followed in the series is $x_{n+1} = 2 	imes x_n + n$,where $n$ is the position index starting from $1$.$9 = 2 	imes 4 + 1$$20 = 2 	imes 9 + 2$$43 = 2 	imes 20 + 3$$90 = 2 	imes 43 + 4$Following this pattern,the next term is:$? = 2 	imes 90 + 5 = 180 + 5 = 185$

Find the next number in the series: $4, 9, 20, 43, 90, ?$

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