91. y=x3−x
93. y=6x3−23x2+15x+14
95. y=x3−5x2+5x+3
97. y=x4−8x3+17x2−2x−14
99. y=x4−10x2+1
101. y=x4−12x3+40x2−24x−36
105.
False
False
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