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TS EAMCET · Maths · Indefinite Integration

If 033x2-4x+2dx=k, then a root of 3x2-4x+2=3k5, that lies in the interval [0,3] is

  1. A 23
  2. B 73
  3. C 12
  4. D 52
Verified Solution

Answer & Solution

Correct Answer

(B) 73

Step-by-step Solution

Detailed explanation

We have, ∫033x2-4x+2dx=k ⇒k=x3-2x2+2x+c03 ⇒k=27-18+6=15. Again we have, 3x2-4x+2=3k5 ⇒3x2-4x+2=3·155=9 ⇒3x2-4x-7=0 ⇒3x2-7x+3x-7=0 ⇒x+13x-7=0 ⇒x=-1 & 73