Question 15 Marks
| Part (a) | Part (b) |
| 1. Number of terms in the expansion of $\left(4 x^2+12 x y+9 y^2\right)^9$ | (a) $\sum_{r=0}^n{ }^n C _r x^{n-r} y^r$ |
| 2. $(2+\sqrt{5})^5+(2-\sqrt{5})^5$ | (b) 9 |
| 3. $999^3$ | (c) 1364 |
| 4. Number of terms in the expansion of $(a+b x)^{17} -(a-b x)^{17}$ | (d) 19 |
| 5. $(x+y)^{ n }$ | (e) 997002999 |
Answer
View full question & answer→(1-d), (2-c), (3-e), (4-b), (5-a)