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k in (-oo:+oo)
3/4 = (k^1)/2 // - (k^1)/2
3/4-((k^1)/2) = 0
3/4-(k/2) = 0
3/4-1/2*k = 0 // - 3/4
-1/2*k = -3/4 // : -1/2
k = -3/4/(-1/2)
k = 3/2
k = 3/2
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