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The solution of the equation log(101)l...

The solution of the equation
`log_(101)log_(7)(sqrt(x+7)+sqrt(x))=0` is -

A

3

B

7

C

9

D

49

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WB JEE PREVIOUS YEAR PAPER-QUESTION PAPER 2014-MULTIPLE CHOICE QUESTIONS
  1. If f(x)={(2x^(2)+1",", x le1),(4x^(3)-1",",x gt 1):}, then int(0)^(2)f...

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  2. If lim(x to 0) (2a sin x-sin2x)/(tan^(3)x) exists and is equal to 1, ...

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  3. The solution of the equation log(101)log(7)(sqrt(x+7)+sqrt(x))=0 is ...

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  4. The integrating factor of the differential equation (1+x^(2))(dy...

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  5. If sqrt(y)=cos^(-1)x, then it satisfies the differential equation (1-x...

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  6. The number of digits in 20^(301) (given log(10)2=0.3010) is

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  7. The area of the region bounded by the curves y=x^(2) and x=y^(2) is-

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  8. Let RR be the set of all real numbers and f : R to R be gi...

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  9. The value of "tan"(pi)/(5) +2"tan"(2pi)/(5)+4"cot"(4pi)/(5) is

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  10. Let f(x) be a differentiable function in [2,7]. If f(2)=3 and f'(x)le5...

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  11. If set A contains p elements and set B contains q elements then their ...

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  12. In a Delta ABC , tan A and tanB are the roots of pq(x^(2)+1) =r^(2)x....

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  13. If y=4x+3 is parallel to a tangent to the parabola y^(2)=12x, then ...

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  14. Let the equation of an ellipse be (x^(2))/(144)+(y^(2))/(25)=1. Then ...

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  15. The straight lines x+y=0, 5x+y=4 and x+5y=4 form

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  16. If sin^(-1)((x)/(13))+"cosec"^(-1)((13)/(12)) =(pi)/(2), then the valu...

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  17. The values of lambda for which the curve (7x+5)^(2)+(7y+3)^(2)=lambda^...

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  18. Let f(x)=x+1//2. Then the number of real values of x for which the t...

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  19. Let f(x)=2x^(2)+5x+1. If we write f(x) as f(x)=a(x+1)(x-2)+b(x-2) (...

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  20. If alpha, beta are the roots of ax^(2)+bx+c=0 (a ne 0) and a+h, beta +...

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