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If A=[(2,3),(5,-2)] then A^(-1) is...

If `A=[(2,3),(5,-2)]` then `A^(-1)` is

A

`-(1)/(9)A`

B

`(1)/(9)A`

C

`(1)/(19)A`

D

`-(1)/(19)A`

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WB JEE PREVIOUS YEAR PAPER-QUESTION PAPER 2007-MULTIPLE CHOICE QUESTIONS
  1. Two cars start moving from the junction point of two perpendicular roa...

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  2. The value of lim(x to 0)(1-cos x)/(x^(2))

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  3. If A=[(2,3),(5,-2)] then A^(-1) is

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  4. The value of x, for which log(3)(5.3^(x-1)+1), log(9)(3^(1-x)+1) and 1...

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  5. A point moves in such a manner that the sum of the squares of the dist...

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  6. If the roots of the equation x^(2)+alpha^(2)=8x+6alpha are real, then ...

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  7. If two circles x^(2)+y^(2)+2gx+2fy=0 and x^(2)+y^(2)+2g'x+2f'y=0 touch...

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  8. The point on the curve y^(2)=x, the tangent at which makes an angle 45...

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  9. lim(x to oo)(1+(1)/(x))^(x//2) is equal to

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  10. The value of lim(n to oo) [(n!)/(n^(n))]^((1)/(n)) is equal to -

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  11. If y=(1)/(1+x+x^(2)+x^(3)), then the value of (d^(2)y)/(dx^(2)) at x=...

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  12. Three integers form an increasing G.P. If the third number is decrease...

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  13. The probability that 3 students can solve a mathematics problem indepe...

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  14. The sum of first n terms of a series is 3^(n)(a+b) when a, b are const...

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  15. A and B are subsets of the universal set uu such that n (uu)=800, n(A)...

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  16. If x^(2)+y^(2)=1, the minimum and maximum values of x+y are

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  17. Let f(x)=a^(x)(a gt 0) be written as f(x)=g(x)+h(x), when g (x) is an ...

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  18. A=[(-i,0),(0,i)] then A^(T)A= (where I is 2xx2 identity matrix)

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  19. Show that ,the maximum value of ((1)/(x))^(x) is e^((1)/(e)

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  20. The value of the integeral int(-pi//7)^(pi//7)x^(3) cos^(2)x dx is

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