填一填一年级数学。1,3,6,10.(15) 小学一年级数学解答题1.3.().3.(),按顺序写,怎么写

\u5c0f\u5b66\u4e00\u5e74\u7ea7\u6570\u5b66\u9898\u627e\u89c4\u5f8b3,3,6,9,15\u540e\u9762\u8fd8\u8981\u586b3\u4e2a\u6570\u600e\u4e48\u586b\u554a

a\uff081\uff09=3\uff0ca\uff082\uff09=3\uff1b
a\uff083\uff09=a\uff081\uff09+a\uff082\uff09=6\uff1b
a\uff084\uff09=a\uff082\uff09+a\uff083\uff09=9\uff1b
a\uff085\uff09=a\uff083\uff09+a\uff084\uff09=15\u3002
\u7efc\u4e0a\u6240\u8ff0\uff0c\u5176\u89c4\u5f8b\u4e3a
a\uff08n\uff09=a\uff08n-2\uff09+a\uff08n-1\uff09\u3002
\u90a3\u4e48
a\uff086\uff09=a\uff084\uff09+a\uff085\uff09=24\uff1b
a\uff087\uff09=a\uff085\uff09+a\uff086\uff09=39\uff1b
a\uff088\uff09=a\uff086\uff09+a\uff087\uff09=63\u3002
\u7b54\uff1a\u586b\u5145\u540e\u7684\u6570\u5217\u4e3a3\uff0c3\uff0c6\uff0c9\uff0c15\uff0c\uff0824\uff09\uff0c\uff0839\uff09\uff0c\uff0863\uff09\u3002

\uff087\uff09\uff0c\uff0811\uff09\u3002
\u89e3\u7b54\u8fc7\u7a0b\u5982\u4e0b\uff1a
\uff081\uff09\u8bbe\u7b2c\u4e00\u4e2a\u7528a1\u8868\u793a\uff0c\u7b2c\u4e8c\u4e2a\u7528a2\u8868\u793a\uff0c\u7b2c\u4e09\u4e2a\u7528a3\u8868\u793a\uff0c\u7b2c\u56db\u4e2a\u7528a4\u8868\u793a\uff0c\u7b2c\u4e94\u4e2a\u7528a5\u8868\u793a\uff0c\u7b2c\u516d\u4e2a\u7528a6\u8868\u793a\u3002
\uff082\uff09\u5219\u6709a1=1\uff0ca2=2\uff0ca3=4\uff0ca6=16\u3002

\u627e\u89c4\u5f8b\u7684\u65b9\u6cd5\uff1a
\u6807\u51fa\u5e8f\u5217\u53f7\uff1a\u627e\u89c4\u5f8b\u7684\u9898\u76ee\uff0c\u901a\u5e38\u6309\u7167\u4e00\u5b9a\u7684\u987a\u5e8f\u7ed9\u51fa\u4e00\u7cfb\u5217\u91cf\uff0c\u8981\u6c42\u6211\u4eec\u6839\u636e\u8fd9\u4e9b\u5df2\u77e5\u7684\u91cf\u627e\u51fa\u4e00\u822c\u89c4\u5f8b\u3002\u627e\u51fa\u7684\u89c4\u5f8b\uff0c\u901a\u5e38\u5305\u5e8f\u5217\u53f7\u3002\u6240\u4ee5\uff0c\u628a\u53d8\u91cf\u548c\u5e8f\u5217\u53f7\u653e\u5728\u4e00\u8d77\u52a0\u4ee5\u6bd4\u8f83\uff0c\u5c31\u6bd4\u8f83\u5bb9\u6613\u53d1\u73b0\u5176\u4e2d\u7684\u5965\u79d8\u3002

1,3,6,10,15,21,28,36,45……

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