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Get Sum Value (Posted on 2007-12-17) Difficulty: 1 of 5
g(y) = y + (-1)y-1, where y is a positive integer.

Determine h(12) + h(17), given that h(g(y)) = y

See The Solution Submitted by K Sengupta    
Rating: 2.5000 (2 votes)

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Solution Solution | Comment 1 of 3
g(y) = y - 1 if y is even,
          y + 1 if y is odd

therefore, g(g(y)) = y

therefore, g(y) = h(y)

h(12) + h(17) = 11 + 18 = 29

In general, h(a) + h(b) = a + b, if one is even and the other is odd



  Posted by Steve Herman on 2007-12-17 12:14:04
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