Class 11 9. Sequences and Series Exercise 9.1 (Available): NCERT Book Solutions
Class 11 chapter 9. Sequences and Series Important key points for quick revision for board exams, ssc and upsc exams preparaion.
NCERT Solutions
All chapters of ncert books Mathematics 9. Sequences and Series Exercise 9.1 (Available) is solved by exercise and chapterwise for class 11 with questions answers also with chapter review sections which helps the students who preparing for UPSC and other competitive exams and entrance exams.
Class 11 chapter 9. Sequences and Series Important key points for quick revision for board exams, ssc and upsc exams preparaion. - 9. Sequences and Series - Exercise 9.1 (Available): NCERT Book Solutions for class 11th. All solutions and extra or additional solved questions for 9. Sequences and Series : Exercise 9.1 (Available) Mathematics class 11th:English Medium NCERT Book Solutions. Class 11 chapter 9. Sequences and Series Important key points for quick revision for board exams, ssc and upsc exams preparaion.
9. Sequences and Series : Exercise 9.1 (Available) Mathematics class 11th:English Medium NCERT Book Solutions
Class 11 chapter 9. Sequences and Series Important key points for quick revision for board exams, ssc and upsc exams preparaion. - 9. Sequences and Series - Exercise 9.1 (Available): NCERT Book Solutions for class 11th. All solutions and extra or additional solved questions for 9. Sequences and Series : Exercise 9.1 (Available) Mathematics class 11th:English Medium NCERT Book Solutions.
Class 11 9. Sequences and Series Exercise 9.1 (Available): NCERT Book Solutions
NCERT Books Subjects for class 11th Hindi Medium
9. Sequences and Series
Class 11 chapter 9. Sequences and Series Important key points for quick revision for board exams, ssc and upsc exams preparaion.
Exercise 9.1 (Available)
Exercise 9.1
Write the first five terms of each of the sequences in Exercises 1 to 6 whose nth terms are:
Q1. Write the first five terms of the sequences whose nth term is an = n(n+2).
Solution: Q1.
is an = n(n+2)
Putting n = 1, 2, 3, 4 and 5 we obtain
a1 = 1(1 + 2) = 1× 3 = 3
a2 = 2(2 + 2) = 2× 4 = 8
a3 = 3(3 + 2) = 3× 5 = 15
a4 = 4(4 + 2) = 4× 6 = 24
a5 = 5(5 + 2) = 5× 7 = 35
Therefore, the five terms are 3, 8, 15, 24 and 35
Q5. Write the first five terms of the sequences whose nth term is an = (-1)n-15n+1
Solution: Q5.
an = (-1)n-15n+1
Putting n = 1, 2, 3, 4 and 5 we obtain
a1 = (-1)1-151+1 = (1)(5)2 = 25
a2 = (-1)2-152+1 = (-1) (5)3 = - 125
a3 = (-1)3-153+1 = (1) (5)4 = 625
a4 = (-1)4-154+1 = (-1) (5)5 = - 3125
a5 = (-1)5-155+1 = (1) (5)6 =156 25
Thus the five terms are 25, -125, 625, - 3125 and 15625
Class 11 chapter 9. Sequences and Series Important key points for quick revision for board exams, ssc and upsc exams preparaion.
See other sub-topics of this chapter:
5. Miscellaneous Exercise on Chapter - 9 (Available)
Class 11 chapter 9. Sequences and Series Important key points for quick revision for board exams, ssc and upsc exams preparaion. - 9. Sequences and Series - Exercise 9.1 (Available): NCERT Book Solutions for class 11th. All solutions and extra or additional solved questions for 9. Sequences and Series : Exercise 9.1 (Available) Mathematics class 11th:English Medium NCERT Book Solutions. Class 11 chapter 9. Sequences and Series Important key points for quick revision for board exams, ssc and upsc exams preparaion.
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Notes And NCERT Solutions
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Mathematics Chapter List
1. Sets
2. Relations and Functions
3. Trigonometric Functions
4. Principle Of Mathematical Induction
5. Complex Numbers and Quadratic Equations
6. Linear Inequalities
7. Permutations and Combinations
8. Binomial Theorem
9. Sequences and Series
10. Straight Lines
11. Conic Sections
12. Introduction to Three Dimensional Geometry
13. Limits and Derivatives
14. Mathematical Reasoning
15. Statistics
16. Probability
