KCET2015MathematicsMathematical Reasoning
The value of ( ⁻¹ ( 2 2 3 )+ ⁻¹ ( 1 3 ) ) is equal to
Options
- A( 6 )
- B( 2 )
- C( 4 )
- D( 2 3 )
Correct answer
B. ( 2 )
Step-by-step solution
Given that, ( ⁻¹ ( 2 2 3 )+ ⁻¹ ( 1 3 ) (1) ) As we know that ( ⁻¹ x= ⁻¹ 1-x² ) Thus, [ ⁻¹ 2 2 3 = ⁻¹ 1- 8 9 = ⁻¹ 1 3 ] Therefore, Eq. (1) can be written as, [ ⁻¹ ( 1 3 )+ ⁻¹ ( 1 3 )= 2 ]