计算:11/1024+21/512+41/256+…+2561/4+5121/2.
问题描述:
计算:1
+21 1024
+41 512
+…+2561 256
+5121 4
. 1 2
答
原式=(1+
)+(2+1 1024
)+4+1 512
+…+256+1 256
+512+1 4
1 2
=(1+2+4+…+256+512)+(
+1 1024
+1 512
+…+1 256
+1 4
)1 2
=
+1−512×2 1−2
−1 1024
×21 2 1−2
=1023+
1023 1024
=1023
.1023 1024