1，3，6，10，15，21，28，这些数字的规律任何用公式表现出来？ 1，3，6，10，15，21的规律，这种题好像有公式，是什么...
1\uff0c3\uff0c6\uff0c10\uff0c15\uff0c21\uff0c28\u7684\u901a\u9879\u516c\u5f0f3-1=2
6-3=3
10-6=4
15-10=5
21-15=6
28-21=7
X-28=8
\u5219\uff1aX=36
\u8fd9\u662f\u4e00\u9053\uff0c\u56fd\u5bb6\u516c\u52a1\u5458\u8003\u8bd5\u5e38\u7528\u7684\u9898\u578b\u3002\u540e\u4e00\u4e2a\u6570\u5b57\u4e0e\u524d\u4e00\u6570\u5b57\u7684\u5dee\u662f\u4e00\u4e2a\u6709\u89c4\u5f8b\u7684\u6570\u5b57\u6392\u5217\u300228\u4e0b\u4e2a\u7684\u5dee\u662f8\uff0c\u5219\u4e0b\u4e2a\u6570\u5b57\u662f36.\u627e\u5230\u89c4\u5f8b\uff0c\u4ee5\u6b64\u7c7b\u63a8\u3002
1\uff0c3\uff0c6\uff0c10\uff0c15\uff0c21\u7684\u89c4\u5f8b\uff0c\u8fd9\u79cd\u9898\u6709\u516c\u5f0f\uff0c\u662f\u6570\u5217\u7684\u901a\u9879\u516c\u5f0f\u3002\u5177\u4f53\u5982\u4e0b\uff1a
\u89e3\uff1a
\u5217\u5165\u6570\u52171\uff0c3\uff0c6\uff0c10\uff0c\uff0c\uff0can\uff0c
a2-a1=2\uff0c
a3-a2=3\uff0c
a4-a3=4\uff0c
\uff1a\uff1a\uff1a
an-a\uff08n-1\uff09\uff1dn\uff0c
\u53ef\u4ee5\u5f97\u51fa\uff1a\u4e0a\u9762\u6240\u6709\u76f8\u52a0\u5316\u7b80\u5f97an-a1=2+3+4+\u2026\u2026+an=1+2+3+4+ \u2026\u2026 +n=n\uff08n+1\uff09\uff0f2\u3002
\u9519\u8bef\u6570\u5b66\u516c\u5f0f\u7279\u5f81
1\u3001\u81ea\u79f0\u662f\u79d1\u5b66\u7684\uff0c\u4f46\u542b\u7cca\u4e0d\u6e05\uff0c\u7f3a\u4e4f\u5177\u4f53\u7684\u5ea6\u91cf\u8861\u3002
2\u3001\u65e0\u6cd5\u4f7f\u7528\u64cd\u4f5c\u5b9a\u4e49(\u4f8b\u5982\uff0c\u5916\u4eba\u4e5f\u53ef\u4ee5\u68c0\u9a8c\u7684\u901a\u7528\u53d8\u91cf\u3001\u5c5e\u4e8e\u3001\u6216\u5bf9\u8c61)\u3002
3\u3001\u65e0\u6cd5\u6ee1\u8db3\u7b80\u7ea6\u539f\u5219\uff0c\u5373\u5f53\u4f17\u591a\u53d8\u91cf\u51fa\u73b0\u65f6\uff0c\u65e0\u6cd5\u4ece\u6700\u7b80\u7ea6\u7684\u65b9\u5f0f\u6c42\u5f97\u7b54\u6848\u3002
4\u3001\u4f7f\u7528\u66a7\u6627\u8bed\u8a00\u7684\u8bed\u8a00\uff0c\u5927\u91cf\u4f7f\u7528\u6280\u672f\u672f\u8bed\u6765\u4f7f\u5f97\u6587\u7ae0\u770b\u8d77\u6765\u50cf\u662f\u79d1\u5b66\u7684\u3002
\u4ee5\u4e0a\u8d44\u6599\u53c2\u8003 \u767e\u5ea6\u767e\u79d1\u2014\u6570\u5b66\u516c\u5f0f
规律第N个数等于从1加到N
1=1
3=1+2
6=1+2+3
10=1+2+3+4
……
X=（N+1)*N/2
nx（n＋1）/2
(n+4)x(n-1)/2+3
1+a=3. 3+a+1=6那么a为自然数，每次加一，表示规律为2.3.4.5........也就是大于2的整数
绛旓細0锛1锛3锛6锛10锛锛15锛夛紝锛21鈥︹︼紙an锛漚锛坣涓1锛夊崄n锛
绛旓細3,6,10,15,21鐨勫甫n瑙勫緥鏄疉n=锛坣+2锛夛紙n+1锛/2銆傛牴鎹鐩彂鐜拌寰嬫槸锛氱1涓暟锛3=1+2銆傜2涓暟锛6=1+2+3銆傜3涓暟锛10=1+2+3+4銆傜4涓暟锛15=1+2+3+4+5銆傜5涓暟锛21==1+2+3+4+5+6銆傜浉鍔犵殑涓暟涓轰綅鏁帮紜1锛浠1璧锋绛夊樊鐩稿姞銆傛墍浠ワ紝An=1+2+...+n+n+1=锛1+...
绛旓細1=1*2/2 3=2*3/2 6=3*4/2 10=4*5/2 15=5*6/2 ...绗琻涓暟蹇呯劧鏄痭(n+1)/2
绛旓細1鍒3鍔犱簡2锛3鍒6鍔犱簡3锛6鍒10鍔犱簡4锛10鍔5绛変簬15锛15鍔6绛変簬21锛21鍔7绛変簬28銆傜涓涓嫭鍙峰～15锛岀浜屼釜鎷彿濉28
绛旓細鍩烘暟璇嶏細1-31 1 one 2 two 3 three 4 four 5 five 6 six 7 seven 8 eight 9 nine 10 ten 11 eleven 12 twelve 13 thirteen 14 fourteen 15 fifteen 16 sixteen 17 seventeen 18 eighteen 19 nineteen 20 twenty 21 twenty-one 22 twenty-two 23 twenty-three 24 twenty-four 25 twenty-...
绛旓細0+1=1锛 1+3=4锛3+6=9 锛6+10=16 锛屾墍浠10+x=25锛 x+y=36锛 涔熷氨鏄0,1,3,6,10锛x,y, x=15,y=21, 姣忎袱涓暟鐩稿姞绛変簬鑷劧鏁扮殑骞虫柟锛屼竴娆＄被鎺
绛旓細3,6,10,15,21鐨勫甫n瑙勫緥鏄疉n=锛坣+2锛夛紙n+1锛/2銆傛牴鎹鐩彂鐜拌寰嬫槸锛氱1涓暟锛3=1+2銆傜2涓暟锛6=1+2+3銆傜3涓暟锛10=1+2+3+4銆傜4涓暟锛15=1+2+3+4+5銆傜5涓暟锛21==1+2+3+4+5+6銆傜浉鍔犵殑涓暟涓轰綅鏁帮紜1锛浠1璧锋绛夊樊鐩稿姞銆傛墍浠ワ紝An=1+2+...+n+n+1=锛1+...
绛旓細3,6,10,15,21鐨勫甫n瑙勫緥鏄疉n=锛坣+2锛夛紙n+1锛/2銆傛牴鎹鐩彂鐜拌寰嬫槸锛氱1涓暟锛3=1+2銆傜2涓暟锛6=1+2+3銆傜3涓暟锛10=1+2+3+4銆傜4涓暟锛15=1+2+3+4+5銆傜5涓暟锛21==1+2+3+4+5+6銆傜浉鍔犵殑涓暟涓轰綅鏁帮紜1锛浠1璧锋绛夊樊鐩稿姞銆傛墍浠ワ紝An=1+2+...+n+n+1=锛1+...
绛旓細1-100鐨勮瘝姹囷細1 one銆2 two銆3 three銆4 four銆5 five銆6 six銆7 seven銆8 eight銆9 nine銆10 ten銆11 eleven銆12 twelve銆13 thirteen銆14 fourteen銆15 fifteen銆16 sixteen銆17 seventeen銆18 eighteen銆19 nineteen銆20 twenty銆21 twenty one銆22 twenty two銆23 twenty three銆24 twenty ...
绛旓細绗涓涓暟锛6=1+2+3銆傜鍥涗釜鏁帮細10=1+2+3+4銆傜浜斾釜鏁帮細15=1+2+3+4+5銆傜n涓暟=1+2+3+4+5+...+n = n(n+1) /2銆傛壘瑙勫緥濉┖鐨勬剰涔 瀹為檯涓婂湪浜庡姞寮哄浜庝竴鑸х殑鏁板垪瑙勫緥鐨勭啛鎮夛紝铏界劧瀹冩湁寰堝瑙ｏ紝浣嗕富瑕佹槸鍩瑰吇浣犲鎵炬暟鍒椾竴鑸寰嬪拰鐚滄祴鏁板垪閫氶」鐨勮兘鍔涳紙鍗宠繍鐢ㄤ笉瀹屽叏褰掔撼娉曠殑鑳藉姏...
