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If (log)3x=aa n d(log)7x=b , then which...

If `(log)_3x=aa n d(log)_7x=b ,` then which of the following is equal to `(log)_(21)x ?` a.`a b` b. `(a b)/(a^(-1)+b^(-1))` c. `1/(a+b)` d. `1/(a^(-1)+b^(-1)`

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RESONANCE DPP-JEE MAINS-All Questions
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  3. If (log)3x=aa n d(log)7x=b , then which of the following is equal to ...

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  4. The equation (log)2(2x^2)+(log)2xdotx^((log)x((log)2x+1))+1/2log4 2(x^...

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  9. The real values of xa n dy for which the following equation is satisfi...

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  10. If (x^2+x)+i ya n d(-x-1)-i(x+2y) are conjugate of each other, then re...

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  12. (x^2-1)/(2x+5)<3

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  13. If ABCD is a cyclic quadrilateral then find the value of sinA+sinB-sin...

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  14. If (log)3x=aa n d(log)7x=b , then which of the following is equal to ...

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  15. (x^2-1)/(x^2+x+1)<1

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  16. If A=[91,3,9,27),(3,9,27,1),(9,27,1,3),(27,1,3,9)] then det A= (A) 0 (...

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  18. The number of solutions of the system of equations "Re(z^(2))=0, |z|=2...

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  19. If a^2x^4+b^2y^4=c^6, then the maximum value of x y is (a)(c^2)/(sq...

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  20. The maximum value of f(x) = 2bx^2 - x^4 -3b is g(b), where b gt 0. If ...

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