Sum of nth terms of AP for Board Exam 2026 | Class 10 Maths | By Ashish Sir

Описание: Most Important Questions of Sum of nth terms of AP for Board Exam 2026 | Class 10 Maths | Ashish Sir
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Arithmetic Progression EXERCISE 5C Y. Find the sum of each of the following AP's: (1)2, 7, 12, 17, ... to 19 terms. (ii) 9/7, 5, 3, ... to 14 terms. )29-,33-37- (,... to 12 terms. 111 112 10... to 11 terms. (1)0.6, 1.7, 2.8,... to 100 terms. 2. Find the sum of each of the following arithmetic series: 7+10+ +14+ +84. (1) 3432+30+...+10. (iii) (-5)+(-8)+(-11)+...+(-230) )5+(-41)+9+(-39)+13+(-37)+17+...+(-5)+81+(-3) 285 HINT (iv) Given sum = (5+9+13+17+...+81)+((-41) + (-39) + ... + (-3)). 3. Find the sum of first in terms of an AP whose nth term is (5-6). Hence, And the sum of its first 20 terms. 4. The sum of the first n terms of an AP is (3n²+6n). Find the nth term and the 15th term of this AP. [CBSE 2014] 5. The sum of the first in terms of an AP is given by S, = (3m²-4n). Find its (i) arth term, (ii) first term and (iii) common difference. [CBSE 2019 The sum of the first terms of an AP is term and the 20th term of this AP. (+) Find the ath (CBSE 2006C) (ii) The sum of the first n terms of an AP is (3m+5m) and the 25th term. 2 Find its sth term [CBSE 2005C] 7/1f mth term of an AP is and ith term is first mn terms. 1 then find the sum of its ICBSE 2017, '1 8. How many terms of the AP 21, 18, 15, ... must be added to get the supa ? 9 How many terms of the AP 9, 17, 25, ... must be taken so that their sum is 636 ICBSE 2017) 10. How many terms of the AP 63, 60, 57, 54, ... must be taken so that their sum is 693? Explain the double answer. 2 must be taken so that their 11. How many terms of the AP 20, 19 3. 183 sum is 300? Explain the double answer. 12. Find the sum of all odd numbers between 0 and 50. [CBSE 2013C