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D( y )
y = 0
y = 0
y = 0
y in (-oo:0) U (0:+oo)
(y+17)/y+(y+32)/y = 149 // - 149
(y+17)/y+(y+32)/y-149 = 0
(y+17)/y+(y+32)/y+(-149*y)/y = 0
y+y-149*y+17+32 = 0
2*y-149*y+49 = 0
49-147*y = 0
(49-147*y)/y = 0
(49-147*y)/y = 0 // * y
49-147*y = 0
49-147*y = 0 // - 49
-147*y = -49 // : -147
y = -49/(-147)
y = 1/3
y = 1/3
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