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If (log)3x=a and (log)7x=b , then which ...

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

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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 ENGLISH-JEE MAINS-All Questions
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  2. The value 'x' satisfying the equation, 4^(log(9)3)+9^(log(2)4)=10^(log...

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  3. If (log)3x=a and (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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  7. For the equation :x^2+18 x+30=2sqrt(x^2+18 x+45)dot (a) product of re...

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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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  11. 2+3/(x+1)>2/x

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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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  17. Value of (1-(cos61^0)/(cos1^0))*(1-(cos62^0)/(cos2^0))*(1-(cos63^0)/(c...

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  18. int e^(sin^(-1)x)((log(e)x)/(sqrt(1-x^(2)))+(1)/(x))dx is equal to

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  19. Solve the system of equations R e(z^2)=0,\ |z|=2

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  20. If a^(2)x^(4)b^(2)y^(4)=c^(6)(a,b,x,y,cgt0) then the maximum value of ...

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