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If^(12)P, = ^(11)P(6)+6.^(11)P(5), then ...

`If^(12)P, = ^(11)P_(6)+6.^(11)P_(5),` then r is equal to

A

6

B

5

C

7

D

none of these

Text Solution

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The correct Answer is:
A
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KCET PREVIOUS YEAR PAPERS-MODEL TEST PAPER - 8-MATHEMATICS
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  2. If a, b, c are in GP and a + x, b + x, c + x are in HP, then the val...

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  3. If^(12)P, = ^(11)P(6)+6.^(11)P(5), then r is equal to

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  4. The number of ways in which any four letters can be selected from the ...

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  5. A library has a copies of one Book, b copies of each of two books, c c...

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  6. If the 4^(th) term in the expansion of (ax+(1)/(x))^('') is 5/2 then t...

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  7. A matrix A satisfying the equation [{:(1 , 3 ) ,(0 , 1):}] A = [{:(1...

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  8. If A, B, C are invertible matrices, then (ABC)^(-1) is equal to

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  9. If a, b, c are different, then value of x satisfying the equation |{...

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  10. Let P and Q be points on the line joining A (-2, 5) and B (3, 1) suc...

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  11. The equation of the line passing through the intersection of the lines...

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  12. If the angle between the two lines represented by 2x^(2)+5xy + 3y^(2) ...

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  13. The value of a for which the lines represented by ax^(2)+5xy +2y^(2) =...

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  14. The equation of the straight line which passes through the point (1, -...

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  15. The joint equation of the straight lines x + y = 1 and x - y = 4 is

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  16. The equation of the circle having radius 3 and touching the circle x^(...

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  17. The locus of the midpoint of a chord of the circle x^(2)+y^(2) = 4 whi...

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  18. The circles x^(2) + y^(2) + x + y = 0 and x^(2) + y^(2)+ x - y = 0 int...

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  19. If the radical axis of the circles x^(2)+y^(2)+2gx + 2fy + c = 0 and...

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  20. The slope of the tangent at the point (h, h) of the circle x^(2) + y^(...

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