NDA2020MathematicsTrigonometric Ratios & IdentitiesActual
Paragraph: Read the following information and answer: Let 3 A A =K , where A 0 and K 1 3 . Question: For real values of A, K cannot lie between
Options
- A1 6 and 5
- B1 2 and 2
- C1 5 and 5
- D1 7 and 7
Correct answer
B. 1 2 and 2
Step-by-step solution
A= (K-3) (3 K-1) For real value of A, ( K-3 3 K-1 ) 0 . For, 1 3 K 3 . A is not real. Also, for 1 2 k 2 , A is not real.