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[(UP1994,95,99,2005,07,08,09,13,15,18)],...

[(UP1994,95,99,2005,07,08,09,13,15,18)],[" 3.सिद्ध कीजिये कि वक्र "2x^(2)+3y^(2)=1" तथा "x^(2)-y^(2)=(1)/(12)],[" एक-दूसरे को समकोण पर काटते हैं। "]

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I. 12x^(2)+ 11x+12 = 10x^(2) + 22x II. 13y^(2) - 18y+3=9y^(2) - 10y

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Q. If 2[[x,9],[y,6]]+3[[1,-1],[0,2]]=[[9,15],[12,18]], then the values of (x+y) is (A) 3 (B) 9 (C) -1 (D) -2

Q. If 2[[x,9],[y,6]]+3[[1,-1],[0,2]]=[[9,15],[12,18]], then the values of (x+y) is (A) 3 (B) 9 (C) -1 (D) -2

The graphs of the equations 2x+3y=11 and x-2y+12=0 intersects at P(x_1,y_1) and the graph of the equation x-2y+12=0 intersects the x-axis at Q(x_2,y_2) . What is the value of (x_1-x_2+ y_1+y_2) ? समीकरणों 2x+3y=11 तथा x-2y+12=0 के आरेख एक दूसरे को P(x_1,y_1) पर काटते ह तथा समीकरण x-2y+12=0 का आरेख x-अक्ष को Q(x_2,y_2) पर काटता है| (x_1-x_2+ y_1+y_2) का मान क्या है?