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If lim(xrarr3)(alphax^2-beta)/(x-3)=12,t...

If `lim_(xrarr3)(alphax^2-beta)/(x-3)=12`,then find the value of `alpha` and `beta`

A

a)`alpha=1`,`beta=2`

B

b)`alpha=2`,`beta=9`

C

c)`alpha=2`,`beta=18`

D

d)none of these.

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UNITED BOOK HOUSE-BETHUNE COLLEGIATE SCHOOL.-EXERCISE
  1. If a,b,c are in A.P .then 3^a,3^band 3^care in

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  2. If the slope of the line joining the points (3lambda,4)and (4,-3lambda...

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  3. If lim(xrarr3)(alphax^2-beta)/(x-3)=12,then find the value of alpha an...

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  4. For any three sets A,B and C,if AcapC=BcapCand AcapC^c=BcapC^cthen sho...

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  5. If f(x)=a(x-b)/(a-b)+b.(x-a)/(b-a)then show that f(a)+f(b)=f(a+b).

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  6. Prove that (1+sec2A)(1+sec2^2A)(1+sec2^3A).....(1+sec2^nA)=(tan2^nA)/(...

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  7. Prove that ,tan(alpha+beta)tan(alpha-beta)=(sin^2alpha-sin^2beta)/(cos...

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  8. How many 5 digit numbers can be formed using the digits 0,2,5,6,7 with...

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  9. Show that ,((1+i)/(1-i))^2+((1-i)/(1+i))^2is a real number.

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  10. Find the distance between the lines 3x+4y=9 and 6x+8y+15=0.

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  11. Find the value of :lim(xrarr0)(sin2x+sin6x)/(sin5x-sin3x)

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  12. In an examination 60% passed in mathematics,68% passes in statistics a...

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  13. If alpha!=betaand atanalpha+b tanbeta=(a+b)tan((alpha+beta)/2),then sh...

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  14. For any three sets A,Band C show that :Acap(BcupC)=(AcapB)cup(AcapC)

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  15. Prove using principle of mathematical induction that sum of the cube t...

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  16. If w be a imaginary cube root of uniyt and a+b+c=0 then show that (a+b...

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  17. Find the sum upto n terms of the following series 4+44+444+….n.

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  18. Show that the straight lines 5x-y=6,x+5y-22=0,5x-y-32=0 and x+5y+4=0 f...

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  19. Find the value of :lim(xrarra)(xsina-asinx)/(x-a)

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  20. Prove that :cot(A-B)cot(B-c)+cot(B-c)cot(C-A)+cot(A-B)cot(B-C)=1

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