计算:11/1024+21/512+41/256+…+2561/4+5121/2.

问题描述:

计算:1

1
1024
+2
1
512
+4
1
256
+…+256
1
4
+512
1
2

原式=(1+

1
1024
)+(2+
1
512
)+4+
1
256
+…+256+
1
4
+512+
1
2

=(1+2+4+…+256+512)+(
1
1024
+
1
512
+
1
256
+…+
1
4
+
1
2

=
1−512×2
1−2
+
1
1024
1
2
×2
1−2

=1023+
1023
1024

=1023
1023
1024