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If f(x)=cos(logx),show that f(x)f(y)-1/2...

If `f(x)=cos(logx)`,show that `f(x)f(y)-1/2`[`f``(x/y)`+`f(xy)`]=0

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UNITED BOOK HOUSE-MODEL QUESTION PAPERS-SET 7-EXERCISE
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  2. If the variance of a distribution is 4 coefficient of variation is 5%,...

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  3. If f(x)=cos(logx),show that f(x)f(y)-1/2[f(x/y)+f(xy)]=0

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  7. Find the co-efficient of 1/xof the expansion of (1+x)^n(1+1/x)^nwhere ...

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  8. Find the sum up to n terms :n.1+(n-1).2+(n-2)3+(n-3).4+....

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  9. If n(p(r-1))/a=n(pr)/b=n(p(r+1))/c,then show that b^2=a(b+c)

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  10. Show that the four lines 2x+y+1=0,2x+y+7=0,x+2y-1=0 and x+2y+5=0 form ...

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  11. Find the equation-of the bisector of the obtused angle between the st...

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  15. Find, form 1st principles, the derivatives of tansqrtxwith respect to ...

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  16. Using contrapositive method show that the following statement is true....

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  17. Find the validity of the following biconditional Statement. A triangle...

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  18. For any three events A. B.' C show thatP(AcupBcupC)=P(A)+P(B)+P(C)-P(A...

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  19. The mean and SD of the scoreing marks of 100 students are 40 and 5.1 r...

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  20. if tan (beta/2)=4 tan (alpha/2),show that tan( (beta-alpha)/2)=(3sinal...

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