请教各位大虾数学题！！！！！！急！！！快~~~~~~~~~~~~~~~~~~~~~~~~偶写作业囊
\u95ee\u4e00\u9053\u6570\u5b66\u9898\uff0c\u521d\u4e00\u7684\uff0c\u62dc\u6258\u5404\u4f4d\u5927\u867e\uff0c\u6211\u6025\uff01\uff01(3-3\u00f713)\u00d713=36
(A a)( AA a)( AAA a)( AAAA a)( AAAAA a).....
\u4ee5\u4e0a\u5206\u7ec4\uff0c\u6bcf\u7ec4\u6709A\uff1a1\u30012\u30013\u30014\u3002\u3002\u3002N\u4e2a
\u4e00\u5171\u6709A\uff1a1+2+3+\u3002\u3002\u3002+N=\uff081+N\uff09N/2\u4e2a
1+2+\u3002\u3002\u3002\u3002+70=2485
\u8bf4\u660e\u4e00\u5171\u670970\u7ec4\uff0c\u518d\u52a02005-2485=20\u4e2aA
\u800c\u6bcf\u4e00\u7ec4\u4e2d\u6709\u4e00\u4e2aa,\u6240\u4ee5\u4e00\u5171\u670970\u4e2aa
解：设锻成的钢材长度为x米。
0.6³=0.09*x
解得x=0.216/0.09=2.4
设锻成的钢材有长x m,根据体积相等有
0.6*0.6*0.6=0.09*x
x=2.4(m)
0，09x2x6除2加上0，09x4
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