Let the function relationship between y and x be given by y = √3√x. What will be the value of y if x = - 27?

Question: Let the function relationship between y and x be given by y = √3√x. What will be the value of y if x = - 27?

সমাধান:
দেয়া আছে, y = √3 × √x
x = - 27 হলে,
y = √3 × √(- 27)
⇒ y = √3 × √(27 × - 1)
⇒ y = √3 × (√27 × √-1)
⇒ y = √3 × (3√3 × i) ; [আমরা জানি, √(- 1) = i]
⇒ y = 3 × 3 × i
⇒ y = 9i

সঠিক উত্তর: (গ) 9i