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The values of b for which the equation 2...

The values of b for which the equation `2log_(1/25)(bx+28)=1log_5(12-4x-x^2)` has coincident roots is/are

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The correct Answer is:
`(-oo,-14)uu{4}uu[14/3,oo)`
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The value of b for which the equation 2log_((1)/(25))(bx+28)=-log_(5)(12-4x-x^(2)) has coincident roots is b=-12 (b) b=4 or b=-12b=4 or b=-12 (d) b=-4 or b=12

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MOTION-QUADRATIC EQUATION-EXERCISE -3 (SUBJECTIVE)
  1. Suppose a cubic polynomial f(x) = x^3 + px^2 + qx + 72 is divisible by...

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  2. If g(x)=x^(3)+px^(2)+qx+r where p,q,r are integers. If g(0) and g(-1)...

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  3. If x be real then find the range of the following rational expressions...

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  4. Find the values of k for which |(x^2+k x+1)/(x^2+x+1)|<2,AAx in R

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  5. Find the range of values of a, such that f(x)=(ax^2+2(a+1)x+9a+4)/(x^2...

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  6. The least value of the quadratic polynomial, f(x) = (2p^(2) + 1) x^(2)...

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  7. Find all real numbers x such that (x-1/x)^(1/2)+(1-1/x)^(1/2)=x

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  8. The minimum value of ((x+1/x)^6-(x^6+1/(x^6))- 2)/((x+1/x)^3+x^3+1/x^...

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  9. Find the product of the real roots of the equation, x^2+18x +30=2sqrt(...

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  10. The values of b for which the equation 2log(1/25)(bx+28)=1log5(12-4x-x...

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  11. Find all the values of the parameters c for which the inequality has a...

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  12. Find the complete set of real values of a for which both roots of the ...

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  13. Let p(x) = x^2+bx+c, where b and c are integers. If p(x) is a factor o...

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  14. Find the value of k for which one root of the equation of x^(2)-(k+1)x...

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  15. If the roots of x^2-ax+b=0 are real and differ by a quantity which is ...

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  16. If alpha, beta are the roots of the equation x^(2)-2x-a^(2)+1=0 and ga...

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  17. Find the values of k so that the quadratic equation x^2+2(k-1)x+k+5=0 ...

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  18. If the equation has four real and distinct roots, then lamda lies in t...

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  19. If the equation has four real and distinct roots, then lamda lies in t...

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  20. If the equation has only two real roods, then the set of values of lam...

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