Sequences And Series — Study Plan
BITSAT · Mathematics
Step-by-step Sequences And Series study plan for BITSAT Mathematics 2026 — structured month-wise approach to mastering this chapter.
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A structured approach to studying Sequences And Series for BITSAT Mathematics.
Study Plan for Sequences And Series
Day 1–2: Learn the Theory
Study the chapter thoroughly. Note down definitions, formulas, and key concepts.
Day 3: Practice Problems
Solve practice questions and previous year BITSAT problems. There are 337 questions available for this chapter.
Day 4: Revise & Test
Revise key formulas and concepts without looking at notes. Take a practice quiz to test your understanding.
What to Focus On
- A sequence is a mapping from natural numbers to real numbers
- Terms are arranged in a specific order with identifiable positions
- Domain represents position of terms, range represents values
- Series = Sum of terms of a sequence
- Finite series: x₁ + x₂ + ... + xₙ = Σₖ₌₁ⁿ xₖ
- Infinite series: x₁ + x₂ + x₃ + ... = Σᵢ₌₁∞ xᵢ
- Common difference d = aₙ₊₁ - aₙ (constant for all terms)
- General term: aₙ = a + (n-1)d
- nth term from end: aₙ = l - (n-1)d, where l is last term
Common Mistakes to Avoid
The sum of first n terms of AP is always Sn = n/2[2a + (n-1)d], so I can use this formula even when the last term is given.
In GP, when r < 1, I should always use the formula Sn = a(1-r^n)/(1-r), and when r > 1, I use Sn = a(r^n-1)/(r-1).
AM ≥ GM means Arithmetic Mean is always greater than Geometric Mean.
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