In mathematics, e is one of the most commonly used transcendental numbers, which is usually used as the base of natural logarithm, that is, In(x)= x logarithm with e as the base. (1) series or function f(n)=( 1+ 1/n)n when n→∞ =e or g (n) = (1+n) when n →∞. ), n is a natural numb from 0 to infinity. That is1+11! + 1/2! + 1/3! +……( 1-2)e^x=sum(( 1/n！ )x n)( 1-3)[n n/(n- 1)(n- 1)]-[(n- 1)(n- 1)/(n Cosx =(e IX+e(-IX))/2 = re(e IX)， Isinx = = (e ix-e (-ix))/2 = iim (e ix) So we can combine the simple properties of trigonometric functions or hyperbolas to calculate relatively complicated formulas, such as the sum angle (2- 1) e x = coshx+sinhx, which means hypcosx+hypsinx, and is also recorded as CHX and SHX. Then click1hypsin+(1hypcos1) or enter 1hs+( 1ho)= or (1hs+( 1ho)). Simply put, you can click 1 inv Ln or enter 1in, which is actually to calculate E 1. We can also get: e = 2.7182818284 59045 23536 02874 713526 (the decimal place of 31is rounded to 7) (4) This is two thousand digits after the decimal point: e = 2.7. 1352 66249 77572 47093 69995 95749 66967 62772 40766 30353 54759 457 13 82 178 525 16 64274 27466 39 1 93 20030 5992 1 86 5438+074 1 35966 29043 57290 03342 95260 59563 0738 1 32328 62794 34907 63233 82988 0753 1 9525 / kloc-0/ 0 190 1 15738 346 5438+087 93070 2 1540 89 149 93488 4 1675 09244 76 146 06680 82264 800 / kloc-0/6 84774 1 1853 74234 54424 37 107 5390 7 77449 92069 55 170 276 18 38606 26 133 1 3845 83000 75204 49338 26560 29760 6737 1 13200 70932 8709 1 27443 74704 72306 96977 2093 1 0 14 1 6 92836 8 1902 55 15 1 08657 46377 2 1 1 12 52389 78442 50569 53696 77078 54499 69967 94686 44549 05987 93 / kloc-0/63 68892 30098 793 12 7736 1 782 15 42499 92295 7635 1 48220 82698 95 193 66803 3 1 825 2 8869 39849 6465 1 05820 93923 98294 88793 32036 25094 43 1 17 30 123 8 1970 684 16 14039 70 / kloc-0/98 37679 32068 32 823 76464 80429 53 1 18 02328 78250 98 194 558 15 30 175 67 173 6 1 332 0698 1 12509 96 18 1 886 5438+059 304 16 9035 1 59888 85 1 93 45807 27386 67385 89422 87922 84998 92086 80582 57492 796 10 484 19 84443 63463 24496 8487 5 60233 62482 704 1 9 78623 20900 2 1609 90235 30436 994 18 49 146 3 1409 343 17 38 143 64054 6253 1 52096 65438 +08369 08887 070 16 76839 64243 78 140 5927 1 45635 4906 1 303 10 72085 10383 7505 1 0 1 157 47704 65438+ 07 189 86 106 87396 96552 1267 1 54688 95703 50354 02 123 40784 98 1 93 3432 1 068 17 0 12 10 05627 8 8023 5 1930 33224 7450 1 58539 04730 4 1995 77770 93503 6604 / kloc-0/ 69973 29725 08868 76966 40355 5707 1 62268 447 16 25607 98 826 5 1787 134 19 5 1246 6520 1 03059 2 1236 677 19 43252 78675 39855 89448 96970 96409 75459 18569 56380 236 37 0 162 1 1 2047 74272 28364 896 13 4225 1 64450 78 182 44235 29486 36372 14 174 02388 9344 1 24796 3574 3 70263 75529 44483 37998 0 16 12 54922 78509 25778 25620 92622 64832 62779 33386 56648 16277 25 164 0 / kloc-0/9 10 59004 96543 8+0644 99828 93 150 56604 72580 27786 3 1864 155 19 56532 44258 69829 46959 3080 1 9 1529 872 1 1 72556 34754 63964 479 10 14590 40905 86298 49679 12874 06870 50489 58586 7 1 747 98546 67757 57320 568 12 88459 2054 1 33405 39220 0 0 1 13 78630 09455 60688 16674 00 1 69 84205 58040 33637 95376 45203 04024 32256 6 1352 78369 5 1 177 88386 38744 39 662 53224 98506 54995 88623 428 1 8 99707 73327 6 17 17 83928 03494 650 14 34558 89707 19425 86398 77275 47 109 62953 746 5438+052 1 / kloc-0/ 15 1 36835 06275 26023 26484 72870 39207 643 10 05958 4 1 166 12054 52970 30236 47254 92966 6938 / kloc-0/ 15 137 32275 36450 98889 03 136 02057 248 17 6585 1 18063 03644 28 123 1 4965 50704 75 102 54465 0 1 172 1 15 55 194 86685 08003 68532 28 183 152 19 60037 35625 27944 9565438