Reciprocal of 71
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Theorem
The decimal expansion of the reciprocal of $71$ is as follows:
- $\dfrac 1 {71} = 0 \cdotp \dot 01408 \, 45070 \, 42253 \, 52112 \, 67605 \, 63380 \, 2816 \dot 9$
This sequence is A021075 in the On-Line Encyclopedia of Integer Sequences (N. J. A. Sloane (Ed.), 2008).
Proof
Performing the calculation using long division:
0.0140845070422535211267605633802816901... ------------------------------------------- 71)1.0000000000000000000000000000000000000... 71 ---- 290 160 80 400 580 284 142 71 355 568 --- --- -- --- --- 600 180 90 450 120 568 142 71 426 71 --- --- -- --- --- 320 380 190 240 490 284 355 142 213 426 --- --- --- --- --- 360 250 480 270 640 355 213 426 213 639 --- --- --- --- --- 500 370 540 570 100 497 355 497 568 71 --- --- --- --- --- 300 150 430 200 ... 284 142 426 142 --- --- --- --- 160 80 400 580
$\blacksquare$