JEE Main 2020 — Sequences And Series Question with Solution
From: JEE Main 2020 (Online) 8th January Evening Slot
Question
If the 10th term of an A.P. is and its 20th term
is , then the sum of its first 200 terms is
Choose an option
Show full solutionCorrect option: B
Correct answer
B
Step-by-step explanation
T10 = a + 9d = ....(1)
T20 = a + 19d = .....(2)
Equation (2) – (1)
10d = -
d =
a + =
a =
S200 =
=
= =
T20 = a + 19d = .....(2)
Equation (2) – (1)
10d = -
d =
a + =
a =
S200 =
=
= =
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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.