JEE Main 2020 — Sequences And Series Question with Solution
From: JEE Main 2020 (Online) 5th September Morning Slot
Question
If 210 + 29.31 + 28
.32 +.....+ 2.39 + 310 = S - 211, then S is equal to :
Choose an option
Show full solutionCorrect option: D
Correct answer
D311
Step-by-step explanation
Let S1 = 210 + 29.31 + 28
.32 +.....+ 2.39 + 310 ....(1)
Also = 29.31 + 28 .32 +.....+ 2.39 + 310 + ......(2)
Performing (1) - (2), we get
S1 = 311 - 211
According to question,
311 - 211 = S - 211
S = 311
Also = 29.31 + 28 .32 +.....+ 2.39 + 310 + ......(2)
Performing (1) - (2), we get
S1 = 311 - 211
According to question,
311 - 211 = S - 211
S = 311
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This is a previous-year question from JEE Main 2020, covering the Sequences And Series chapter of Mathematics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.