BITSAT2020MathematicsTrigonometric EquationsActual
The value of [ n +(-1)^ n 4 ], n I is
Options
- A0
- B1 2
- C- 1 2
- DNone of these
Correct answer
B. 1 2
Step-by-step solution
[ n +(-1)^ n 4 ]=(-1)^ n [(-1)^ n 4 ] [ ( n + )=(-1)^ n ] aligned &=(-1)^ n (-1)^ n 4 & . [(-1)^ n ]=(-1)^ n ] &=(-1)^ 2 n 4 = 4 = 1 2 aligned