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In an arithmetic sequence, (a_3=14) and (a_{12}=59). What is (a_{20})?
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Answer and explanation
Correct answer: (99)
From (9d=45), (d=5), so (a_{20}=59+8\cdot5=99). It is easier to find a far term from a nearby given term.
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What is the correct answer to this question?
(99)
Why is this the correct answer?
From (9d=45), (d=5), so (a_{20}=59+8\cdot5=99). It is easier to find a far term from a nearby given term.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Sequences and Progressions. Topic: nth term.
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