COMEDK2017MathematicsDefinite Integration
If _ a ^ b x^ n x^ n +(16-x)^ n d x=6 , then
Options
- Aa=4, b=12, n R
- Ba=2, b=14, n R
- Ca=-4, b=20, n R
- Da=2, b=8, n R
Correct answer
B. a=2, b=14, n R
Step-by-step solution
_ a ^ b x^ n x^ n +(16-x)^ n d x=6...(i) Let a+b=16 , then _ a ^ b (16-x)^ n (16-x)^ n +x^ n d x=6..(ii) Adding Eqs. (i) and (ii), we get _ a ^ b 1 d x=12 b-a=12 Solving a+b=16 and b-a=12 , we get a=2, b=14, n R