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If in the binomial expansion of (a+x) ^(...

If in the binomial expansion of `(a+x) ^(n) ` where n is a natural number, the coefficients of 5 th, 6 th and 7 th terms are in A.P., then n is equal to-

A

7 or 13

B

7 or 15

C

7 or 14

D

18 or 14

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The correct Answer is:
C
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CHHAYA PUBLICATION-MCQ's-QUESTION PAPER 7
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  2. If ((1+i)/(1-i))^(x)=1, then-

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  3. If in the binomial expansion of (a+x) ^(n) where n is a natural numbe...

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  4. If z and w are two non-zero complex numbers such that |zw| =1 and argw...

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  5. The modulus and the amplitude of (1+isqrt3)^(2) are respectively-

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  6. The complex number z satisfying the question |(i -z)/(i+z)|=1 lies on-

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  7. If the mth and nth terms of a H.P. are n and m respectively, then its ...

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  8. Solution of the inequations -11 le 4x -3 lt 13 is-

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  9. Two roots of the quadratic equation ix^(2) -10x -21i=0 is-

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  10. In three dimension space, (7,6,3) and (4,10, 1),(-2, 6, 2) and (1,2,4)...

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  11. If theta is a variable paramete, then the equations x= 1/4(3- cosec ^(...

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  12. In three dimensional space, if a pints lies on the octant OXY'Z, then ...

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  13. If the axes are transferred to parallel axes through the point (alpha ...

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  14. If the ara of the triangle formed by joining the points (2,7) ,(5,1) a...

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  15. If A(3,5) , B(-5, -4) , C(7,10) are the vertices of a parallelogram t...

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  16. The circe x ^(2) +y^(2) +8y-4 =0 cuts the real circel x ^(2) +y^(2) +g...

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  17. Distance between the parallel lines y=2x+7 and y=2x+5 is-

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  18. For what value of c does the straight line y= 2x+c intersect the circe...

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  19. Orthocentre of the triangle formed by the lines x+y=1, x=0 and y=0 is-

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  20. If the circel x ^(2) + y^(2) -(3p +4) x - (p -2)y + 10p=0 passes throu...

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