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If three equal positive numbes a,b,c are in G.P,then show that `a+c>2b`

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UNITED BOOK HOUSE-HARE SCHOOL-EXERCISE
  1. Show that the roots of (b+c)x^2-(a+b+c)x+a=0are rational .where a,b,c ...

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  2. The sum of n terms of an A.P is n^2.Find the common difference.

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  3. If three equal positive numbes a,b,c are in G.P,then show that a+c>2b

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  4. For what value(S)of K the point (1,-1),(2,1) and (K,5) lie on the same...

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  5. (at^2,2at)is a point on the line 2x-5y+12a=0,from this find the co-ori...

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  6. Find the angle between the two lines x-sqrt3y=3and sqrt3x-y+1=0

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  7. Evaluate: underset(x rarr 0)(lim)(3^(x)-1)/((4+x)^(1/2)-2)

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  8. What is the probability of obtaining 7 points with the rolling of two ...

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  9. Show that the equation of straight line xcosalpha+ysinalpha=p can be e...

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  10. If G is the G.M between two positive numbers a and b.show that 1/(G^2-...

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  11. Three positive numbers a,b,c are in A.P prove that 1/(sqrtb+sqrtc),1/(...

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  12. If a1,a2,a3,...,aaare in A.P then show that 1/(a1a2)+1/(a2a3)+1/(a3a4)...

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  13. If the roots of the equation p(q-r)x^2+q(r-p)x+r(p-q)=0 be equal ,show...

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  14. Solve :barz=iz^2(z being a complex number)

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  15. if alpha,beta,gamma are in A>P show that cot=(sinalpha-singamma)/(cosg...

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  16. Prove that (1)/(2sin10^(@))-2sin70^(@)=1.

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  17. Prove that 0le3costheta+4sintheta+5le10

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  18. Show that 4(cos^3 10^@+sin^3 20^@)=3(cos10^@+sin20^@)

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  19. If the equation x^2-cx+d=0and x^2-ax+b=0 have a common root,and the ro...

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  20. If alphaand betaare roots of the equation qx^2+px+p=0,show that sqrt(a...

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