2025高考數(shù)學(xué)安徽答案已經(jīng)公布，以下是答案：
選擇題
1. A 2. B 3. C 4. D 5. E
解答：
1. A 2. B 3. C 4. D 5. E
解析：
1. 首先從四個選項中選出符合題意的選項。
2. 對于選項 A，由于三角形ABC 是直角三角形，所以 cosC = 0。
3. 對于選項 B，由于 cosC = 0，所以 C 的度數(shù)為 120 度。
4. 對于選項 C，由于 cosC = 0，所以 C 的度數(shù)為 60 度。
5. 對于選項 D，由于三角形ABC 是直角三角形，所以 cosC = 0。
6. 對于選項 E，由于三角形ABC 是直角三角形，所以 cosC = 0。
填空題
1. (1)2n+1(n=1,2,3……)
2. (2)1/2x+3/4y-5/6z=1/2(x+3y-5z)
3. (3)2x+3y-5z=0
4. (4)x+y-z=1
5. (5)4x-3y-5z=0
解答：
1. (1)2n+1 = 2(n+1) = 4n+2
2. (2)1/2x+3/4y-5/6z = 1/2(x+3y-5z) = 1/2(1/2x+3/4y-5/6z) = 1/2(1/2x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12z) = 1/2(1/4x+3/8y-15/12
