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Sequences and Series question

2021 · 31 Aug · Shift 1 · Q26
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  5. /2021 · 31 Aug · Shift 1 · Q26

Sequences and Series question

2021 · 31 Aug · Shift 1 · Q26

JEE MainMathematicsSequences and SeriesMCQ+4 / −1
Three numbers are in an increasing geometric progression with common ratio r. If the middle number is doubled, then the new numbers are in an arithmetic progression with common difference d. If the fourth term of GP is 3 r2, then r2 −-− d is equal to :
  1. A
    7 −-− 7 3\sqrt 33​
  2. B
    7 + 3\sqrt 33​
  3. C
    7 −3-\sqrt 3−3​
  4. D
    7 + 3 3\sqrt 33​
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