美国MITBBS

jkxf 写了： 18 2月 2026, 21:08

影子不对，阳光从左方照着树干，树干的阴影在右边，人的影子也应该朝右

jkxf 写了： 28 2月 2026, 21:18

找到的不要提前说答案

第10排右边第6

jkxf 写了： 昨天, 20:55

-81

To find x^{27}, we can solve this algebraically using the properties of polynomials:

Step 1: Rearrange the Equation

Starting from the given equation:

Rearranging terms gives:

Step 2: Use the Sum of Cubes Identity

Recall the sum of cubes factorization:

Since x² - x + 1 = 0, multiplying both sides by (x + 1) gives:

Step 3: Compute x^{27}

Now, express x^{27} in terms of x³:

Substitute x³ = -1:

Final Answer

-1

门前镜湖水 写了： 今天, 10:21

是个复数

门前镜湖水 写了： 今天, 10:27

To find x^{27}, we can solve this algebraically using the properties of polynomials:

Step 1: Rearrange the Equation

Starting from the given equation:

Rearranging terms gives:

Step 2: Use the Sum of Cubes Identity

Recall the sum of cubes factorization:

Since x² - x + 1 = 0, multiplying both sides by (x + 1) gives:

Step 3: Compute x^{27}

Now, express x^{27} in terms of x³:

Substitute x³ = -1:

Final Answer

-1

嗯，我昨天不小心算错了，我的算法是把x-1移相回去，然后两边同时平方