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Sum of roots of the equation 4^(x)-3(2^(...

Sum of roots of the equation `4^(x)-3(2^(x+3))+128=0`, is

A

0

B

7

C

5

D

8

Text Solution

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The correct Answer is:
B
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CENGAGE-QUADRATIC EQUATIONS -TEST YOURSELF (Multiple Choice Questions)
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  3. If p(x)=ax^(2)+bx+c and Q(x)=-ax^(2)+dx+c, where ac!=0, then P(x)xxQ(x...

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  4. If roots of the equation (q-r)x^(2)+(r-p)x+(p-q)=0 are equal, then p,q...

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  5. If 3p^(2)=5p+2 and 3q^(2)=5q+2 where p!=q, then pq is equal to

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  6. If alpha and beta are the roots of the quadratic equation x^(2)+bx-c=0...

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  7. Let p,q in {1,2,3,4}. The number of equations of the form px^(2)+qx+1=...

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  8. Find the number of rational roots of the equation (x+2)(x+3)(x+8)(x+12...

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  9. Solutions of the equation (6-x)^(4)+(8^(4)-x)^(4)=16 are

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  10. Solution of the equation sqrt(2x^(2)+5x-2)-sqrt(2x^(2)+5x-9)=1 are

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  11. Solutions of the equation 64xx9^(x)-84xx12^(x)+27xx16^(x)=0 are

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  12. Let alpha,beta be the roots of the equation x^(2)-x+p=0 and gamma,de...

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  13. If alpha,beta are the roots of the equation x^(2)-3x+5=0 and gamma,d...

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  14. If cos^(4)theta+p,sin^(4)theta+p are the roots at the equation x^(2)+a...

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  15. If alpha and beta roots of the equation x^(2)-p(x+1)-c=0 hen (alpha^(2...

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  16. The quadratic equation, product of whose roots x(1) and x(2) is equal ...

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  17. If one root of the equation x^(2)-dx+12=0 is even prime, while x^(2)+d...

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  18. The graph of a quadratic polynomial y=ax^(2)+bx+c,a,b,c in R is as sho...

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  19. If x+1/x=5 then x^(3)-5x^(2)+x+(1)/(x^(3))-(5)/(x^(2))+1/x=

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  20. If (a^(2)-1)x^(2)+(a-1)x+(a^(2)-4a+3)=0 is an identity in x, then the ...

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