求1ⁿ+﹙-1﹚ⁿ/4-﹙-1﹚ⁿ+﹙-1﹚ⁿ﹢¹/4的值﹙ⁿ为正整数﹚
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![求1ⁿ+﹙-1﹚ⁿ/4-﹙-1﹚ⁿ+﹙-1﹚ⁿ﹢¹/4的值﹙ⁿ为正整数﹚](/uploads/image/z/13326937-25-7.jpg?t=%E6%B1%821%26%238319%3B%EF%BC%8B%EF%B9%99%EF%BC%8D1%EF%B9%9A%26%238319%3B%EF%BC%8F4%EF%BC%8D%EF%B9%99%EF%BC%8D1%EF%B9%9A%26%238319%3B%EF%BC%8B%EF%B9%99%EF%BC%8D1%EF%B9%9A%26%238319%3B%EF%B9%A2%26%23185%3B%EF%BC%8F4%E7%9A%84%E5%80%BC%EF%B9%99%26%238319%3B%E4%B8%BA%E6%AD%A3%E6%95%B4%E6%95%B0%EF%B9%9A)
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求1ⁿ+﹙-1﹚ⁿ/4-﹙-1﹚ⁿ+﹙-1﹚ⁿ﹢¹/4的值﹙ⁿ为正整数﹚
求1ⁿ+﹙-1﹚ⁿ/4-﹙-1﹚ⁿ+﹙-1﹚ⁿ﹢¹/4的值﹙ⁿ为正整数﹚
求1ⁿ+﹙-1﹚ⁿ/4-﹙-1﹚ⁿ+﹙-1﹚ⁿ﹢¹/4的值﹙ⁿ为正整数﹚
当n为奇数时
原式=1-1/4+1+1/4=2
当n为偶数时
原式=1+1/4-1-1/4=0
当n为奇数时,答案为3/4;当n为偶数时,答案是 -3/4