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Question Number 131159 by mohammad17 last updated on 02/Feb/21

Commented by mohammad17 last updated on 02/Feb/21

$$whocansolvethis?$$

Commented by mohammad17 last updated on 02/Feb/21

$$chousetherightanswer$$

Commented by EDWIN88 last updated on 02/Feb/21

$$a_n=\frac{(2n+3)!}{(n+1)!}=\frac{(2n+3)(2n+2)!}{(n+1)!}$$$$=$$

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