1. n(n+1)(n+2) 6
2. n(n+1)(2n+1) 6
3. n(n+1)(2n+7) 6
4. n(n+1)(2n+9) 6
<u>n(n+1)(2n+7)<br> </u> 6
1. 18720
2. 18270
3. 17280
4. 12780
17280
1. (12, 6)
2. (10, 5)
3. (9, 4)
4. (16, 7)
(10, 5)
1. 128
2. 256
3. 512
4. 1024
512
1. 21
2. 23
3. 25
4. 27
23
1. 4C
2. 4C + 1
3. 3C
4. 2C
2C
1. e
2. e2 + e
3. e2
4. e2-e
e<sup>2</sup>-e
1. 2 loge 2-2
2. 2 - loge 2
3. 2 loge 4
4. loge 4
2 - log<sub>e</sub> 2
1. x2 + 2x - 16 = 0
2. x2 + 2x +15 = 0
3. x2 + 2x - 12 = 0
4. x2 + 2x - 8 = 0
x<sup>2</sup> + 2x - 8 = 0
1. x3 - 6x2 + 36x + 27 = 0
2. x3 + 6x2 + 36x + 27 = 0
3. x3 - 6x2 - 36x + 27 = 0
4. x3 + 6x2 - 36x + 27 = 0
x<sup>3</sup> + 6x<sup>2</sup> - 36x + 27 = 0