It seems strange, as if it came out of thin air, but you should know that it is inferred from calculation.

See the answer will be like this, you know.

The idea of solving the problem ≠ the answer, in fact, 7 is for

(2) paving the way, (1) is not the purpose.

This question is quite difficult, when Jiangxi college entrance examination.

Second, the province is required to score 2 people.

(2 points for one person, 65438+ 0 point for one person) The remaining hundreds of thousands of points are all 0 points.

It's basically a waste question. I once asked the proposer Tao Pingsheng's thoughts face to face, and he was a little fooled, so I guess I don't want to mention this topic.