Show that the expression (ax-b)*(cx-d)/(bx-a)*(dx-c) can have all the values for real x if (a*a)-(b*b) and (c*c)-(d*d) have the same sign.


2 years ago

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                                        Hello student,Please find the answer to your question belowGiven(ax-b)*(cx-d)/(bx-a)*(dx-c)=(acx2-(ad+bc)x+bd)/bdx2-(bc+ad)x+ac=x2-((d/c)+(b/a))x+(bd/ac)/x2-((c/d)+(a/b))x+(ac/bd)So by finding the discriminant of the equation from the above we can observe thatthe expression (ax-b)*(cx-d)/(bx-a)*(dx-c) can have all the values for real x if (a*a)-(b*b) and (c*c)-(d*d) have the same sign.

one month ago

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