CBSE Class 10 Maths (Standard) 2023 · Paper 30/2/1 · Question 32
How many terms of the arithmetic progression must be taken so that their sum is ? Explain the double answer.
Answer
or ; the extra terms (from the 8th onward become negative) cancel so both give the sum .
🔒 Step-by-step solution
Sign up free to see every step of how it is worked out.
From the board paper
More questions from Arithmetic Progressions
Class 10 Maths — every question with an expert-verified, step-by-step solution.
- Q1 In which of the following situations does the list of numbers involv…
- Q2 Write the first four terms of the AP when the first term a and t…
- Q3 For the following APs, write the first term and the common diff…
- Q4 Which of the following are APs? If they form an AP, find the commo…
- Q1 Fill in the blanks in the following table, given that a is the fir…
- Q2 Choose the correct choice in the following and justify: (i) 30th te…
- Q3 In the following APs, find the missing terms in the boxes: (i) 2,…
- Q4 Which term of the AP: 3, 8, 13, 18, …, is 78?
- Q5 Find the number of terms in each of the following APs: (i) 7, 13,…
- Q6 Check whether -150 is a term of the AP: 11, 8, 5, 2, …
- Q7 Find the 31st term of an AP whose 11th term is 38 and the 16t…
- Q8 An AP consists of 50 terms of which 3rd term is 12 and the last…
All 441 questions on Arithmetic Progressions → Browse all Maths chapters →