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AP EAMCET · Maths · Indefinite Integration

If (2x+1)6(3x+2)8dx=P2x+13x+2Q+R, then PQ=

  1. A 172
  2. B 17
  3. C 72
  4. D 4
Verified Solution

Answer & Solution

Correct Answer

(A) 172

Step-by-step Solution

Detailed explanation

Given, ∫(2x+1)6(3x+2)8dx=P2x+13x+2Q+R Put t=2x+13x+2 ⇒dtdx=3x+22-2x+133x+22 ⇒dt=dx3x+22 ∴∫(2x+1)6(3x+2)8dx=∫t6dt ∫t6dt=t77+C=172x+13x+27+C ⇒P=17, Q=7 & R=C ∴PQ=177=172