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Black Advanced Problems in Mathematics
Exam
Black Advanced Problems in Mathematics
Subject
Mathematics
Chapter
Indefinite and Definite Integration

Black Advanced Problems in Mathematics · Mathematics · Indefinite and Definite Integration

∫ ( 9x + 6x)/(2 5x - 1) dx = A 4x + B x + C , then A + B is equal...

∫cos⁡9x+cos⁡6x2cos⁡5x−1dx=Asin⁡4x+Bsin⁡x+C\int \frac{\cos 9x + \cos 6x}{2\cos 5x - 1} dx = A\sin 4x + B\sin x + C, then A+BA + B is equal to : (Where CC is constant of integration)

Options

  1. A12\frac{1}{2}
  2. B34\frac{3}{4}
  3. C2
  4. D54\frac{5}{4}

Correct answer

D. 54\frac{5}{4}

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