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Pertanyaan

∫ sec 3 x d x = …

  1. begin mathsize 12px style 1 half s e c x space tan x space plus 1 half ln open vertical bar sec x plus tan x close vertical bar plus C end style

  2. begin mathsize 12px style 1 half s e c x space tan x space minus 1 half ln open vertical bar sec x plus tan x close vertical bar plus C end style

  3. begin mathsize 12px style negative 1 half s e c x space tan x space plus 1 half ln open vertical bar sec x plus tan x close vertical bar plus C end style

  4. begin mathsize 12px style s e c x space tan x space plus ln open vertical bar sec x plus tan x close vertical bar plus C end style

  5. begin mathsize 12px style s e c x space tan x space minus ln open vertical bar sec x plus tan x close vertical bar plus C end style

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I. Roy

Master Teacher

Mahasiswa/Alumni Universitas Negeri Surabaya

Jawaban terverifikasi

Jawaban

jawaban yang tepat adalah A

jawaban yang tepat adalah A

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Pembahasan

Gunakan integral parsial, misalkan Ingat rumus integral parsial Sehingga jawaban yang tepat adalah A

begin mathsize 12px style sec cubed space x space equals space sec space x space. space sec squared space x integral sec cubed x space d x equals integral sec x space. space sec squared x space d x end style

Gunakan integral parsial, misalkan begin mathsize 12px style u equals sec x rightwards arrow fraction numerator d u over denominator d x end fraction equals sec x space tan x rightwards arrow d u equals sec x space tan x space d x end style

begin mathsize 12px style d v equals sec squared x rightwards arrow v equals integral sec squared x space d x equals tan x end style

Ingat rumus integral parsial begin mathsize 12px style integral u d v equals u v minus integral v d u end style

begin mathsize 12px style integral sec cubed x space d x equals sec x space t a n x minus integral tan x space. space sec x space. space tan x space d x integral sec cubed x space d x equals sec x space t a n x minus integral tan squared x space. space sec x space d x integral sec cubed x space d x equals sec x space t a n x minus integral open parentheses sec squared x minus 1 close parentheses space. space sec x space d x integral sec cubed x space d x equals sec x space t a n x minus integral open parentheses sec cubed x minus sec x close parentheses space d x integral sec cubed x space d x equals sec x space t a n x minus integral sec cubed x space d x plus integral sec x space d x 2 integral sec cubed x space d x equals s e c x space tan x space plus integral sec x space d x 2 integral sec cubed x space d x equals s e c x space tan x space plus ln open vertical bar sec x plus tan x close vertical bar plus C integral sec cubed x space d x equals 1 half s e c x space tan x space plus 1 half ln open vertical bar sec x plus tan x close vertical bar plus C end style

Sehingga jawaban yang tepat adalah A

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∫ ln x d x = …

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