Q53.If the sum of the series 20 + 19 35 + 19 51 + 18 54 +. . . . . . . . . . up to nth term is 488 and the nth term is negative, then : (1) nth term is −4 52 (2) n = 41 (3) nth term is −4 (4) n = 60 k, then 18k is equal to:
What This Question Tests
Despite the garbled question text, this problem fundamentally tests the application of formulas for the nth term and sum of an arithmetic progression, requiring careful algebraic manipulation to find n or T_n.
Concepts Tested
Formulas Used
T_n = a + (n-1)d
S_n = n/2 * (a + T_n)
📚 NCERT Sections This Tests
3.20 — For The Decomposition Of Azoisopropane To Hexane And Nitrogen At 543
Chemistry Class 11 · Chapter 3
3.20 For the decomposition of azoisopropane to hexane and nitrogen at 543 K, the following data are obtained. t (sec) P(mm of Hg) 0 35.0 360 54.0 720 63.0 Calculate the rate constant.
1.18 — A Point Charge Of 2.0 Mc Is At The Centre Of A Cubic Gaussian
Physics Class 11 · Chapter 1
1.18 A point charge of 2.0 mC is at the centre of a cubic Gaussian surface 9.0 cm on edge. What is the net electric flux through the surface?
3.23 — The Rate Constant For The Decomposition Of Hydrocarbons Is 2.418 × 10–5S–1
Chemistry Class 11 · Chapter 3
3.23 The rate constant for the decomposition of hydrocarbons is 2.418 × 10–5s–1 at 546 K. If the energy of activation is 179.9 kJ/mol, what will be the value of pre-exponential factor.
📋 Question Details
- Chapter
- Sequences & Series
- Topic
- Arithmetic Progression
- Year
- 2020
- Shift
- 03 Sep Shift 2
- Q Number
- Q53
- Type
- MCQ
- NCERT Ref
- Class 11 Mathematics Ch 9: Sequences and Series
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