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The points with position vectors 60hati+...

The points with position vectors `60hati+3hatj, 40hati-8hatj` and `a hati-52 hatj` are collinear if -

A

a=40

B

a=-40

C

a=20

D

a=-20

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The correct Answer is:
B
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CHHAYA PUBLICATION-MCQ ZONE -Question Paper 2
  1. If A is a square matrix of order 3xx3 and lambda is a scalar, then adj...

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  2. If veca, vecb,vec c are unit vectors such that veca+vecb+vec c=veco, t...

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  3. The points with position vectors 60hati+3hatj, 40hati-8hatj and a hat...

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  4. If the diagonals of a parallelogram are 3hati+hatj-2hatk and hati-3hat...

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  5. Let PQRS be a parallelogram whose diagonals PR and QS intersect at O'....

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  6. If f(x)=(2x+1)/(3x-2), then (fof)(2) is equal to -

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  7. The relation R is defined on the set of natural numbers N as x is a f...

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  8. The value of sin((1)/(2)"cos"^(-1)(4)/(5)) is -

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  9. Let C and R be the sets of complex numbers and real numbers respectiv...

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  10. Let X be the random variable of the number of points obtained in singl...

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  11. If n and p are two parameters of a binomial distribution, state which ...

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  12. The domain of definition of the function sin^(-1)[log(3)((x)/(3))] is ...

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  13. The value of cot((pi)/(4)-2cot^(-1)3) is -

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  14. If y=sqrt(sin sqrt(x)), then the value of (dy)/(dx) is -

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  15. If f(x)=cos^(-1)[(1-(logx)^(2))/(1+(logx)^(2))], then the value of f'...

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  16. If y=a cos m x-b sin m x, then the value of (d^(2)y)/(dx^(2)) is -

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  17. If y=x^(e^(x)), then the value of (dy)/(dx) is -

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  18. If 2^(x)+2^(y)=2^(x+y), then the value of (dy)/(dx) at x=y=1 is -

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  19. If f(x)=x(x-1)(x-2), 0 le x le 4, then the point x=c which satisfies m...

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  20. Let f(x)=x|x|. Then the set of points where f(x) is twice differentiab...

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