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Find the changes in the sign of the foll...

Find the changes in the sign of the following expressions and find their extreme values.
`15+4x-3x^(2)`

A

`49//3`

B

`-49//3`

C

`47//3`

D

`-47//3`

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The correct Answer is:
A
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DIPTI PUBLICATION ( AP EAMET)-QUADRATIC EXPRESSIONS-EXERCISE 1B (QUADRATIC EXPRESSIONS)
  1. the expression 2x ^2 + 4x +7 has minimum value m at x= alpha ...

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  2. The extreme value of x^2 - 5x +6 is

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  3. Find the changes in the sign of the following expressions and find the...

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  4. If a(1), a(2),…a(n) are in H.P. then a(1).a(2) + a(2).a(3) + a(3).a(4)...

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  5. IF a,b,c are positive then the least value of (a +b+c)(1//a+1//b ...

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  6. If a,b,c are distinct positive numbers then the 3expression ( b+...

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  7. IF a^2 + b^2 +c^2 =1 then the range of ab+bc +ca is

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  8. In triangle ABC, range of (a^(2)+b^(2)+c^(2))/(ab+bc+ca) is (a,b,c are...

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  9. The solution set of -x^2 +3x+4gt 0 is

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  10. the solution set of x^2-4x - 21 ge 0 is

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  11. the solution set of 1 le x^2 -2x is

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  12. the solution set of x^2 gt 4x+5 is

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  13. The solution set of 2x^2-4x +5 gt 0 is

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  14. the solution set of x^2 - 2x + 2 lt 0 is

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  15. the set of all solutions of the inequation x^2-2x +5 le 0 in ...

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  16. The set of solutions of |x| ^2-5|x|+4 lt 0 is

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  17. if the expression 4x - 5x^2 +1 is positive if x lies in

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  18. the expression -7x ^2 + 8x -9 is positive if x lies in

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  19. the expression x^2 -5x-6 is negative is x lies in

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  20. The greatest positive integral value of x for which 200-x ( ...

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