式18: .2 5 equals StartFraction, left parenthesis, "y" minus .5 , right parenthesis squared Over .3 0 , EndFraction plus StartFraction, left parenthesis, "x" minus 1.1 , right parenthesis squared Over 1 , EndFraction.25=y−.52.30+x−1.121
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式19: .2 5 equals StartFraction, left parenthesis, "y" minus .5 , right parenthesis squared Over .3 0 , EndFraction plus StartFraction, left parenthesis, "x" plus 1.1 , right parenthesis squared Over 1 , EndFraction.25=y−.52.30+x+1.121
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式20: "y" equals .1 left parenthesis, "x" minus 0 , right parenthesis squared plus 4.6 5 left brace, "x" greater than negative 1.6 , right brace left brace, "x" less than 1.6 , right bracey=.1x−02+4.65x>−1.6x<1.6
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式21: .1 5 equals left parenthesis, "x" minus left parenthesis, negative 2.6 9 , right parenthesis , right parenthesis squared plus left parenthesis, "y" minus 1.6 , right parenthesis squared.15=x−−2.692+y−1.62
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式22: .1 5 equals left parenthesis, "x" minus 4 , right parenthesis squared plus left parenthesis, "y" minus 8.3 5 , right parenthesis squared.15=x−42+y−8.352
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式23: "y" equals 1 left parenthesis, "x" , right parenthesis squared plus 6 left brace, "y" less than or equal to 7 , right bracey=1x2+6y≤7
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式24: "y" equals negative 1.1 left parenthesis, "x" , right parenthesis squared plus 8.1 left brace, "y" greater than or equal to 7 , right bracey=−1.1x2+8.1y≥7
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式25: .2 equals StartFraction, left parenthesis, "x" plus 2.4 2 , right parenthesis squared Over .0 5 , EndFraction plus StartFraction, left parenthesis, "y" minus 1 , right parenthesis squared Over 0.4 , EndFraction.2=x+2.422.05+y−120.4
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式26: .2 equals StartFraction, left parenthesis, "x" plus 2.6 5 , right parenthesis squared Over .0 5 , EndFraction plus StartFraction, left parenthesis, "y" minus 0.9 , right parenthesis squared Over 0.4 , EndFraction.2=x+2.652.05+y−0.920.4
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式27: .2 equals StartFraction, left parenthesis, "x" plus 2.8 9 , right parenthesis squared Over .0 5 , EndFraction plus StartFraction, left parenthesis, "y" minus 0.9 9 , right parenthesis squared Over 0.4 , EndFraction.2=x+2.892.05+y−0.9920.4
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式28: .2 equals StartFraction, left parenthesis, "x" plus 3.1 , right parenthesis squared Over .0 5 , EndFraction plus StartFraction, left parenthesis, "y" minus 1.2 , right parenthesis squared Over 0.4 , EndFraction.2=x+3.12.05+y−1.220.4
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式29: .2 equals StartFraction, left parenthesis, "x" plus 2.2 4 , right parenthesis squared Over .0 5 , EndFraction plus StartFraction, left parenthesis, "y" minus 1.3 , right parenthesis squared Over 0.4 , EndFraction.2=x+2.242.05+y−1.320.4
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式30: .2 equals StartFraction, left parenthesis, "x" minus 3.9 8 , right parenthesis squared Over .0 5 , EndFraction plus StartFraction, left parenthesis, "y" minus 9.0 2 , right parenthesis squared Over 0.4 , EndFraction.2=x−3.982.05+y−9.0220.4
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式31: .2 equals StartFraction, left parenthesis, "x" minus 4.2 1 , right parenthesis squared Over .0 5 , EndFraction plus StartFraction, left parenthesis, "y" minus 9 , right parenthesis squared Over 0.4 , EndFraction.2=x−4.212.05+y−920.4
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式32: .2 equals StartFraction, left parenthesis, "x" minus 4.4 1 , right parenthesis squared Over .0 5 , EndFraction plus StartFraction, left parenthesis, "y" minus 8.8 , right parenthesis squared Over 0.4 , EndFraction.2=x−4.412.05+y−8.820.4
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式33: .2 equals StartFraction, left parenthesis, "x" minus 3.7 3 , right parenthesis squared Over .0 5 , EndFraction plus StartFraction, left parenthesis, "y" minus 8.9 5 , right parenthesis squared Over 0.4 , EndFraction.2=x−3.732.05+y−8.9520.4
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式34: .2 equals StartFraction, left parenthesis, "x" minus 3.5 4 , right parenthesis squared Over .0 5 , EndFraction plus StartFraction, left parenthesis, "y" minus 8.7 , right parenthesis squared Over 0.4 , EndFraction.2=x−3.542.05+y−8.720.4
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式35: "y" equals negative 1.5 left parenthesis, "x" , right parenthesis squared plus 8.5 left brace, "y" greater than or equal to 7 , right bracey=−1.5x2+8.5y≥7