2002
Mathematics
JAMB
If x varies directly as √n and x = 9 when n = 9, find x when n = (17/9)
A.
4
B.
27
C.
√3
D.
√17
Correct Answer: √17
Explanation
x ∝ √n x = k√n 9 = k√9 ⟹ 9 = 3k k = 3 x = 3√n When n = 17/9, x = 3 × √(17/9) = √17
x ∝ √n x = k√n 9 = k√9 ⟹ 9 = 3k k = 3 x = 3√n When n = 17/9, x = 3 × √(17/9) = √17THIS WEEK's
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