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CAT 2025 Progressions & Series: Master AP, GP & HP Concepts Video Lecture | Quantitative Aptitude (Quant)
FAQs on CAT 2025 Progressions & Series: Master AP, GP & HP Concepts Video Lecture - Quantitative Aptitude (Quant)
| 1. What are the differences between Arithmetic Progression (AP), Geometric Progression (GP), and Harmonic Progression (HP)? |  |
Ans. Arithmetic Progression (AP) is a sequence in which the difference between consecutive terms is constant. For example, in the sequence 2, 4, 6, 8, the common difference is 2. Geometric Progression (GP) is a sequence where each term after the first is found by multiplying the previous term by a fixed, non-zero number called the ratio. An example is 3, 6, 12, 24, where the common ratio is 2. Harmonic Progression (HP) is a sequence of numbers where the reciprocals of the terms form an Arithmetic Progression. For instance, if we take the sequence 1, 1/2, 1/3, 1/4, the reciprocals (1, 2, 3, 4) form an AP.
| 2. How do you calculate the nth term of an AP, GP, and HP? | |
Ans. For an Arithmetic Progression, the nth term can be calculated using the formula: a + (n-1)d, where 'a' is the first term and 'd' is the common difference. In a Geometric Progression, the nth term is found using the formula: a * r^(n-1), where 'a' is the first term and 'r' is the common ratio. For a Harmonic Progression, first, find the nth term of the corresponding AP (which is the reciprocals of the terms in HP), and then take the reciprocal of that term.
| 3. What are some common applications of AP, GP, and HP in real life? | |
Ans. Arithmetic Progressions are often used in calculating monthly payments or schedules, like loan repayments. Geometric Progressions can be found in situations involving exponential growth, such as population growth or compound interest in finance. Harmonic Progressions are used in situations involving rates, like speed and time, or in physics when dealing with frequencies and wavelengths.
| 4. How can I solve problems involving AP, GP, and HP in CAT exam? | |
Ans. To solve problems involving AP, GP, and HP in the CAT exam, first identify the type of progression. Then, use the relevant formulas to find the terms or sum. Practice solving various problems to become familiar with different scenarios, and focus on understanding the relationships between terms in the sequences.
| 5. Are there any shortcuts or tips for solving progression problems in competitive exams? | |
Ans. Yes, some useful shortcuts include memorizing the formulas for the nth term and the sum of the first n terms for AP, GP, and HP. Additionally, for GP problems, remember that the product of the first and last term can help in finding the middle term. Analyzing the patterns and using options elimination can also save time during the exam.
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