Observe the following formula: 1 ^ 2 + (1 * 2) ^ 2 + 2 ^ 2 = (1 * 2 + 1) ^ 2 ^ 2 + (2 * 3) ^ 2 + 3 ^ 2 = (3 * 2 + 1) ^ 2 ^ 2 + (3 * 4) ^ 2 + 4 ^ 2 = (3 * 4 + 1) ^ 2 Observe the following rules 1^2+(1*2)^2+2^2=(1*2+1)^2 2^2+(2*3)^2+3^2=(3*2+1)^2 3^2+(3*4)^2+4^2=(3*4+1)^2 ① Write the 2011 formula ② Write the formula on line N and prove your conclusion

Observe the following formula: 1 ^ 2 + (1 * 2) ^ 2 + 2 ^ 2 = (1 * 2 + 1) ^ 2 ^ 2 + (2 * 3) ^ 2 + 3 ^ 2 = (3 * 2 + 1) ^ 2 ^ 2 + (3 * 4) ^ 2 + 4 ^ 2 = (3 * 4 + 1) ^ 2 Observe the following rules 1^2+(1*2)^2+2^2=(1*2+1)^2 2^2+(2*3)^2+3^2=(3*2+1)^2 3^2+(3*4)^2+4^2=(3*4+1)^2 ① Write the 2011 formula ② Write the formula on line N and prove your conclusion

①2011^2+(2011*2012)+2012^2=(2012*2011+1)^2
②n^2+[n*(n+1)]+(n+1)^2=[n*(n+1)+1]^2

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