找规律,16题
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找规律,16题
找规律,16题
找规律,16题
4x6-5^2=24-25=-1
n(n+2)-(n+1)^2=-1
4×6-5×5=24-25=-1
A×(A+2)-(A+1)(A+1)
AA+2A-(AA+2A+1)
=AA-AA+2A-2A-1
=-1
4*6-5^2=24-25=-1
n(n+2)-(n+1)^2=n^2+2n-n^2-2n-1=-1
(1)4*6-5^2=24-25=-1
(2)n*(n+2)-(n+1)^2=n^2+2n-(n^2+2n+1)=-1