1题：已知a,b,c是三角形ABC的三边且满足a^2+b+根号下c-1与2的差的绝对值=10a+2倍根号下b-4再+（-22）,则三角形ABC为什么三角形?2题：一列数2,4,8,16,32.等,根据此规律,第18个数为______,第n个数为____3题

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