AP EAMCET2009MathematicsDefinite Integration
₀^ 1 1+ x d x is equal to
Options
- A1
- B2
- C-1
- D-2
Correct answer
B. 2
Step-by-step solution
aligned & Let I= ₀^ 1 1+ x d x & = ₀^ 1 1+ 2 x 2 1+ ^2 x 2 d x & = ₀^ ^2 x 2 (1+ x 2 )^2 d x & Put x 2 =t 1 2 ^2 x 2 d x=d t & I= ₀^ 2 d t (1+t)^2 = [- 2 1+t ]₀^ =2 & aligned