4.定义一种运算‘#”它对于正整数n满足以下运算性质:
4.定义一种运算‘#”它对于正整数n满足以下运算性质:(1).2#1001=1(2)(2n+2)#1001=3*[(2n)#1001].则2008#1001的值是?...
4.定义一种运算‘#”它对于正整数n满足以下运算性质:
(1).2#1001=1
(2) (2n+2)#1001=3*[(2n)#1001].
则2008#1001的值是? 展开
(1).2#1001=1
(2) (2n+2)#1001=3*[(2n)#1001].
则2008#1001的值是? 展开
1个回答
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易知
当N = 1时
4#1001 = (2×1 + 2)#1001 = 3×(2#1001) = 3×1 = 3 = 3^1
当N = 2时
6#1001 = (2×2 + 2)#1001 = 3×(4#1001) = 3×3 = 9 = 3^2
当N = 3时
8#1001 = (2×3 + 2)#1001 = 3×(6#1001) = 3×9 = 27 = 3^3
……
呈3的倍数逐渐递增。用归纳法推广得通项公式
(2N + 2)#1001 = 3^N
则2008#1001
= (2×1003 + 2)#1001 = 3^1003
3^1003表示3的1003次方
当N = 1时
4#1001 = (2×1 + 2)#1001 = 3×(2#1001) = 3×1 = 3 = 3^1
当N = 2时
6#1001 = (2×2 + 2)#1001 = 3×(4#1001) = 3×3 = 9 = 3^2
当N = 3时
8#1001 = (2×3 + 2)#1001 = 3×(6#1001) = 3×9 = 27 = 3^3
……
呈3的倍数逐渐递增。用归纳法推广得通项公式
(2N + 2)#1001 = 3^N
则2008#1001
= (2×1003 + 2)#1001 = 3^1003
3^1003表示3的1003次方
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