3^2-1^2=4x2;4^2-2^2=4x3;5^2-3^2=4x4第n个式子为

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3^2-1^2=4x2;4^2-2^2=4x3;5^2-3^2=4x4第n个式子为3^2-1^2=4x2;4^2-2^2=4x3;5^2-3^2=4x4第n个式子为3^2-1^2=4x2;4^2-2^

3^2-1^2=4x2;4^2-2^2=4x3;5^2-3^2=4x4第n个式子为
3^2-1^2=4x2;4^2-2^2=4x3;5^2-3^2=4x4第n个式子为

3^2-1^2=4x2;4^2-2^2=4x3;5^2-3^2=4x4第n个式子为
(n+2)^2-n^2=4*(n+1)