1+2+4+8+16+32+64+128+256+512+1024=_.
问题描述:
1+2+4+8+16+32+64+128+256+512+1024=______.
答
令a=1+2+4+8+16+32+64+128+256+512+1024
则2a=2+4+8+16+32+64+128+256+512+1024+2048,
2a-a
=(2+4+8+16+32+64+128+256+512+1024+2048)-(1+2+4+8+16+32+64+128+256+512+1024)
=2048-1
=2047.
答:算式的结果是2047.
故答案为:2047.