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If 4x+5y=83 and (3x)/(2y)=(21)/(22) , th...

If `4x+5y=83` and `(3x)/(2y)=(21)/(22)` , then `y-x=?` (a) 3 (b) 4 (c) 7 (d) 11

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If x^3-2x^2y^2+5x+y-5=0 and y(1)=1 , then (a) y^(prime)(1)=4/3 (b) y'(1)=-4/3 (c) y''(1)=-8(22)/(27) (d) y^(prime)(1)=2/3

If x^3-2x^2y^2+5x+y-5=0 and y(1)=1 , then (a) y^(prime)(1)=4/3 (b) y'(1)=-4/3 (c) y''(1)=-8(22)/(27) (d) y^(prime)(1)=2/3