Class 11 Mathematics Chapter 9 Sequences And Series Quiz 18 (11 MCQs)

Quiz Instructions

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1. Write the sum of the first n even natural numbers

Correct Answer: C) N(n +1).

2. Find the first four terms of the sequence given the rule:a$_{1}$ = 10:a$_{n}$ = a$_{n-1}$(3)

Correct Answer: D) 10, 30, 90, 270.

3. Find the missing terms of the arithmetic sequence:145, ..... , ..... , ..... , 205

Correct Answer: D) 160, 175, 190.

4. Evaluate the geometric series below:a$_{1}$ =-2, a$_{n}$ =-1458, r = 3

Correct Answer: C) -2186.

5. Which formula represents this arithmetic sequence:

Correct Answer: D) N + 6.

6. Use Pascal's triangle or the Binomial Theorem to expand (-x + 3y)$^{3}$.

Correct Answer: D) -x$^{3}$ + 9x$^{2}$y-27xy$^{2}$ + 27y$^{3}$.

7. Write the recursive formula of 13, 9, 5 .....

Correct Answer: D) A$_{n}$=a$_{n-1}$-4.

8. Evaluate the series:$\sum_{n=1}^63n$

Correct Answer: A) 63.

9. Find the sum of the series $\sum_{k=0}^4k^3$

Correct Answer: B) 100.

10. The symbol $t_1$

Correct Answer: A) First Term.

11. What is the common ratio of this geometric sequence?{2, 10, 50, 250, ..... }

Correct Answer: A) 5.