ExamBro
ExamBro
enEnglishhiहिन्दीguગુજરાતી
JEE Mains · Maths · STD 11 - 8. sequence and series

\({a_1},{a_2},.......,{a_{30}}\) એ સમાંતર શ્રેણીમાં છે. \(S = \sum\limits_{i = 1}^{30} {{a_i}} \) અને \(T = \sum\limits_{i = 1}^{15} {{a_{2i - 1}}} \). જો  \({a_5} = 27\) અને \(S - 2T = 75\) , તો \(a_{10}\) મેળવો.

  1. A \(52\)
  2. B \(57\)
  3. C \(47\)
  4. D \(42\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(52\)

Step-by-step Solution

Detailed explanation

\(S = \sum\limits_{i - 1}^{30} {{a_i}} \,\,\,\,,T = \sum\limits_{i - 1}^{15} {{a_{2i - 1}}} \,\,\,\,\,,{a_5} = 27,S - 2T = 75\) Let \({a_i} = a + \left( {i - 1} \right)D\) \(S = {a_1} + {a_2} + {a_3} + ........... + {a_{30}}\)…
Same subject
Explore more questions on app
From JEE Mains
Explore more questions on app