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যদি হয়, তাহলে 8(α + β) এর মান কত?

  1. 4
  2. -8
  3. -4
  4. 8

Answer (Detailed Solution Below)

Option 3 : -4

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গণনা:

প্রদত্ত,

=

সীমাটি সংজ্ঞায়িত হওয়ার জন্য, α = -1

এখন,

⇒

⇒

⇒

∴

∴ α = -1 এবং β =

∴ 8(α + β) =

= - 4

∴ 8(α + β) এর মান -4।

সঠিক উত্তর বিকল্প 3.

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