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b in (-oo:+oo)
1/2 = ((b/4)^1)/4 // - ((b/4)^1)/4
1/2-(((b/4)^1)/4) = 0
(-1/16)*b+1/2 = 0
1/2-1/16*b = 0 // - 1/2
-1/16*b = -1/2 // : -1/16
b = -1/2/(-1/16)
b = 8
b = 8
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