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Let a ,b ,c be real. If a x^2+b x+c=0 ha...

Let `a ,b ,c` be real. If `a x^2+b x+c=0` has two real roots `alphaa n dbeta,w h e r ealpha<-1a n dbeta>1` , then show that `1+c/a+|b/a|<0`

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To solve the problem, we need to show that if the quadratic equation \( ax^2 + bx + c = 0 \) has two real roots \( \alpha \) and \( \beta \) such that \( \alpha < -1 \) and \( \beta > 1 \), then the inequality \( 1 + \frac{c}{a} + \left| \frac{b}{a} \right| < 0 \) holds. ### Step 1: Understanding the Roots Given that the roots \( \alpha \) and \( \beta \) are real and \( \alpha < -1 \) and \( \beta > 1 \), we can conclude that the quadratic opens upwards (i.e., \( a > 0 \)) or downwards (i.e., \( a < 0 \)) based on the nature of the roots. ### Step 2: Evaluating the Function at Specific Points We evaluate the quadratic function \( f(x) = ax^2 + bx + c \) at \( x = -1 \) and \( x = 1 \): - For \( x = -1 \): ...
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CENGAGE ENGLISH-GRAPHS OF ELEMENTARY FUNCTIONS -EXERCISES
  1. Let a ,b ,c be real. If a x^2+b x+c=0 has two real roots alphaa n dbet...

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  2. Draw the graph of y= (1)/((1//x)).

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  3. (a) Draw the graph of f(x) = ={{:(1",",, |x| ge 1), ((1)/(n^(2)) ",",,...

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  4. Sketch the regions which points satisfy |x+y| ge 2.

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  5. Sketch the region satisfying |x| lt |y|.

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  6. For a point P in the plane, let d1(P)a n dd2(P) be the distances of th...

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  7. Draw the graph of y= (x-1)/(x-2).

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  8. The following figure shows the graph of f(x) =ax^(2)+bx +c, then find ...

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  9. The entire graph of the equation y=x^2+k x-x+9 in strictly above the x...

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  10. If x^2+2a x+a<0AAx in [1,2], the find the values of a.

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  11. Draw the graph of f(x) = x|x|.

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  12. Draw the graph of the function: Solve |(x^2)/(x-1)|lt=1 using the grap...

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  13. Draw the graph of y = |x^(2) - 2x|-x.

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  14. Draw the graph of y = {{:(2^(x)",",, x^(2)-2x le 0 ),( 1+3.5 x- x^(2),...

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  15. Draw the graph of f(x) = |x-1|+ |2x-3|. Find the range of the functio...

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  16. Draw the graph of f(x) =y= |x-1|+3|x-2|-5|x-4| and find the values of ...

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  17. Find the set of real value(s) of a for which the equation |2x+3|+|2x-3...

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  18. Draw the graph of y= 2^(((|x|+x))/(x)).

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  19. Draw the graph of y= x ^((1)/(log(e)x)).

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  20. Find the number of solutions to the equation x+log(e)x=0.

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  21. Draw the graph of f(x)=x+[x], [.] denotes greatest integer function.

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