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標題:
-2,-7,-12,-17的通項
發問:
-2,-7,-12,-17的通項
最佳解答:
此文章來自奇摩知識+如有不便請留言告知
通項=-2+(n-1)(-5)=3-5n
其他解答:
-2,-7,-12,-17的通項: -2+(n-1)(-5) =-2-5n+5 =-2+5-5n =3-5n|||||通項 = a + ( n - 1 )d = - 2 + - 5 ( n - 1 ) = - 2 + - 5n + 5 = 3 + - 5n = 3 - 5n So the answer is ( 3 - 5n ) .
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