upteto17 q120
0. For three non-zero real numbers a, b, c if 
, then the value of k is,
- Option : B
- Explanation : (B)
= λ (Let)
∴ a = 2λ, b = 3λ, c = 4λ .....(i)
and 2a - 3b + 5c = λk .....(ii)
From Eqs. (i) and (ii), we get
2(2λ) - 3(3λ) + 5(4λ) = λk
⇒ λ(4 - 9 + 20) = λk ⇒ k = 15
