What does “Geometric progression” actually mean in Sequences & Series, and why does it matter for JEE?
a sequence with a constant ratio r; the nth term is a·r^(n−1).
In simple words: a sequence with a constant ratio r; the nth term is a·r^(n−1). Getting Geometric progression clear matters because JEE questions on Sequences & Series usually test this idea directly, not just a formula you memorised.
Key point
Geometric progression
Common mistake
adding the ratio instead of multiplying by it.
Memory tip
in a GP you MULTIPLY by r each step, not add.
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