2010
Mathematics
67ca00ce0c643c71d77dee1f
If x is inversely proportional to y and x = 2(1/2) when y = 2, find x if y = 4
A.
4
B.
5
C.
1(1/4)
D.
2(1/4)
Correct Answer: 1(1/4)
Explanation
x α 1/y .........(1) x = k x 1/y .........(2) When x = 2(1/2) = 5/2, y = 2 (2) becomes 5/2 = k x 1/2 giving k = 5 from (2), x = 5/y so when y =4, x = 5/y = 1(1/4)
x α 1/y .........(1) x = k x 1/y .........(2) When x = 2(1/2) = 5/2, y = 2 (2) becomes 5/2 = k x 1/2 giving k = 5 from (2), x = 5/y so when y =4, x = 5/y = 1(1/4)THIS WEEK's
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