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7. Find the sum to n terms of the A.P., whose k th term is 5k + 1.
27
Oct
7. Find the sum to n terms of the A.P., whose k th term is 5k + 1. 7. Find the sum to n terms of the A.P. whose k th term is 5k + 1. October 27, 2021 Category: Chapter 9 - Sequences and Series , Maths , NCERT Exemplar Class 11 ,
6. If the sum of a certain number of terms of the A.P. 25, 22, 19, … is 116. Find the last term.
27
Oct
6. If the sum of a certain number of terms of the A.P. 25, 22, 19, … is 116. Find the last term. -22 … is 116. Find the last term. 19 6. If the sum of a certain number of terms of the A.P. 25 October 27, 2021 Category: Chapter 9 - Sequences and [...]
5. In an A.P., if p th term is 1/q and qth term is 1/p , prove that the sum of first pq terms is 1/2 (pq +1), where p ≠ q.
27
Oct
5. In an A.P., if p th term is 1/q and qth term is 1/p , prove that the sum of first pq terms is 1/2 (pq +1), where p ≠ q. 5. In an A.P. if p th term is 1/q and qth term is 1/p prove that the sum of first pq terms [...]
4. How many terms of the A.P. – 6, -11/2 , – 5, … are needed to give the sum –25?
27
Oct
4. How many terms of the A.P. – 6, -11/2 , – 5, … are needed to give the sum –25? -11/2 … are needed to give the sum –25? 4. How many terms of the A.P. – 6 5 October 27, 2021 Category: Chapter 9 - Sequences and Series , Maths , NCERT Exemplar [...]
3. In an A.P., the first term is 2 and the sum of the first five terms is one-fourth of the next five terms. Show that 20th term is –112.
24
Oct
3. In an A.P., the first term is 2 and the sum of the first five terms is one-fourth of the next five terms. Show that 20th term is –112. 3. In an A.P. the first term is 2 and the sum of the first five terms is one-fourth of the next five terms. Show [...]
2. Find the sum of all natural numbers lying between 100 and 1000, which are multiples of 5.
24
Oct
2. Find the sum of all natural numbers lying between 100 and 1000, which are multiples of 5. 2. Find the sum of all natural numbers lying between 100 and 1000 which are multiples of 5. October 24, 2021 Category: Chapter 9 - Sequences and Series , Maths , NCERT Exemplar Class 11 ,
Find the sum to n terms of the series nth terms is given by 9. n^2 + 2^n
27
Oct
Find the sum to n terms of the series nth terms is given by 9. n^2 + 2^n Find the sum to n terms of the series nth terms is given by 9. n^2 + 2^n October 27, 2021 Category: Chapter 9 - Sequences and Series , Maths , NCERT Exemplar Class 11 ,
Find the sum to n terms of the series nth terms is given by 10. (2n – 1)^2
27
Oct
Find the sum to n terms of the series nth terms is given by 10. (2n – 1)^2 Find the sum to n terms of the series nth terms is given by 10. (2n - 1)^2 October 27, 2021 Category: Chapter 9 - Sequences and Series , Maths , NCERT Exemplar Class 11 ,
1. Show that the sum of (m + n)^th and (m – n)^th terms of an A.P. is equal to twice the m^th term.
27
Oct
1. Show that the sum of (m + n)^th and (m – n)^th terms of an A.P. is equal to twice the m^th term. 1. Show that the sum of (m + n)^th and (m – n)^th terms of an A.P. is equal to twice the m^th term. October 27, 2021 Category: Chapter 9 - [...]
2. If the sum of three numbers in A.P., is 24 and their product is 440, find the numbers.
27
Oct
2. If the sum of three numbers in A.P., is 24 and their product is 440, find the numbers. 2. If the sum of three numbers in A.P. find the numbers. is 24 and their product is 440 October 27, 2021 Category: Chapter 9 - Sequences and Series , Maths , NCERT Exemplar Class 11 [...]