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Let veca=hati+hatj+2hatk, vecb=2hati+2h...

Let `veca=hati+hatj+2hatk, vecb=2hati+2hatj, vec c=3hati+5hatj-2hatk` and `vecd=-hatj+hatk`, then the ratio of the modulis of the vectors `vecb-veca` and `vecd-vec c` is -

A

`2:3`

B

`3:1`

C

`1:3`

D

`3:2`

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The correct Answer is:
C
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CHHAYA PUBLICATION-MCQ ZONE -Question Paper 5
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  4. If vecr(1)=hati+2hatj-2hatk and vecr(2)=3hatj-4hatk, then the angle be...

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  6. If |veca|=7,|vecb|=sqrt(26) and |veca xx vecb|=35, then the value of v...

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  7. The equation of any plane parallel to y -axis is -

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  8. If |vecb|=4 and (veca+vecb)*(veca-vecb)=9, then the value |veca| is -

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  9. If the line vecr=(2hati-hatj+3hatk)+lambda(2hati+hatj+2hatk) is paral...

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  13. If f(x)=log(x)(log(e)x), then the value of f'(e ) is -

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  14. If y=(cos^(-1)x)^(2), then the value of (1-x^(2))y(2)-xy(1) is -

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  16. If y=a^(x)b^(2x-1), then the value of (d^(2)y)/(dx^(2)) is -

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  20. If (x+y)^(m+n)=x^(m)y^(n), then the value of (dy)/(dx) is -

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