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The circle x^2+y^2-2x-2y+k=0represents a...

The circle `x^2+y^2-2x-2y+k=0`represents a point circle when k.=

A

a)0

B

b)-1

C

c)1

D

d)2

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UNITED BOOK HOUSE-MODEL QUESTION PAPERS-SET 12-EXERCISE
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  2. The acute angle between the two lines' 7x - 4y = 0 and 3x -11y = 2 wil...

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  3. The circle x^2+y^2-2x-2y+k=0represents a point circle when k.=

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  4. The value of lim(xrarr3)(sqrt(x+3)+sqrt(x-3))/xis

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  6. Two dice are thrown at a time.The probability that the sum of two numb...

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  7. The median of 1st 2013 natural number is

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  8. For any two sets A and B, if A cupB = A cap B, then show that A = B.

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  9. A = {1, 2, 3, 4, 5}, B = {1, 3, 4} and the relation R from set A to se...

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  10. Show that tan67^@-tan22^@-tan67^@tan22^@=1

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  11. In /\ABC, if angleC = 90^@,. then find the value of tan A + tan B.

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  12. If ^nPr=120 ^nC(n-r) , find the value of r.

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  13. x.and y are- real and if x + iy.=5/(-3+4i),find the value of x and y.

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  14. Find the constant term of the expansion of (a^3-1/a^2)^15

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  15. If the P th term of an AP is (3P - 5), then find the common difference...

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  16. Find the equation of a straight fine passes through the middle ofthe s...

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  17. Find the ratio in which the plane xy divides the join of A(2, 3. 5) an...

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  18. If y=xe^x,show that xdy/dx=(1+x)y.

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  19. f(x)=x^2+ax,when 0lexle1 and f(x)=3-bx^2,when 1lexle2 if limxrarr1f(x...

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  20. A unbiased coin tossed three times. Find the probability of getting 1 ...

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