1. Chapter 7 Class 12 Integrals (Term 2)
  2. Serial order wise
  3. Miscellaneous

Misc 41 (MCQ) - Chapter 7 Class 12 Integrals (Term 2)

Last updated at Aug. 9, 2021 by

Misc 41 - Class 12 - Integration - dx/ ex + e-x is equal

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Misc 41 - Chapter 7 Class 12 Integrals - Part 2

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  1. Chapter 7 Class 12 Integrals (Term 2)
  2. Serial order wise

    3. Miscellaneous

    Using Formulaes →

Transcript

Misc 41 βˆ«β–’π‘‘π‘₯/(𝑒^π‘₯ + 𝑒^(βˆ’π‘₯) ) is equal to (A) tan^(βˆ’1) (𝑒^π‘₯ )+𝐢 (B) tan^(βˆ’1)⁑〖(𝑒^(βˆ’π‘₯) )+𝐢〗 (C) log⁑(𝑒^π‘₯βˆ’π‘’^(βˆ’π‘₯) )+𝐢 (D) log⁑(𝑒^π‘₯+𝑒^(βˆ’π‘₯) )+𝐢 βˆ«β–’π‘‘π‘₯/(𝑒^π‘₯ + 𝑒^(βˆ’π‘₯) ) = βˆ«β–’π‘‘π‘₯/(𝑒^π‘₯ + 1/𝑒^π‘₯ ) = ∫1β–’(𝑒^π‘₯ 𝑑π‘₯)/(𝑒^2π‘₯ + 1) Let 𝑒^π‘₯=𝑑 𝑑𝑑/𝑑π‘₯=𝑒^π‘₯ dt = 𝑒^π‘₯ 𝑑π‘₯ Substituting, = ∫1▒𝑑𝑑/(𝑑^2 +1) = γ€–π‘‘π‘Žπ‘›γ€—^(βˆ’1) (𝑑)+ C Putting value of t = 〖𝒕𝒂𝒏〗^(βˆ’πŸ) (𝒆^𝒙 )+ C Hence, answer is (A). (∫1▒〖𝑑π‘₯/(π‘₯^2 + 1)=γ€–π‘‘π‘Žπ‘›γ€—^(βˆ’1) π‘₯γ€— " " )

Chapter 7 Class 12 Integrals (Term 2)
Serial order wise

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Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.