MCQ · ঢাকা বিশ্ববিদ্যালয় ভর্তি পরীক্ষা · ২০২২
∫ dx/(eˣ + e⁻ˣ) এর মান কত?
- কtan⁻¹(e⁻ˣ)
- খtan(e⁻ˣ)
- গtan⁻¹(eˣ)
- ঘtan(eˣ)
সঠিক উত্তর: গ) tan⁻¹(eˣ)
ব্যাখ্যা
∫ eˣdx/(1 + (eˣ)²) = ∫ d(eˣ)/(1 + (eˣ)²) = tan⁻¹(eˣ) + c।
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