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The conjugate of 1/(3-4i) is...

The conjugate of `1/(3-4i)` is

A

`3/(25)-4/(25)i`

B

`3/(25)+4/(25)i`

C

`4/(25)-3/(25)i`

D

`4/(25)+3/(25)i`

Text Solution

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The correct Answer is:
C
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ICSE-SAMPLE QUESTION PAPER 02-SECTION B
  1. The conjugate of 1/(3-4i) is

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  2. The eccentricity of the ellipse (x^2)/25+(y^2)/9=1 is ,

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  3. If the distance between the points (a,2,1)and (1,-1,1) is 5, then the ...

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  4. If the parabola of y^2=4ax passes through the point (3,2), find the le...

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  5. Find the equation of the hyperbole with eccentricity 5/3 and foci(pm5,...

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  6. Write the negation of the statement sum of 4 and 5 is 10 ?

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  7. Prove that : ~(prArrq)=p^^(~q)

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  8. Write converse and inverse of the given conditional statement: If a...

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  9. Find the equation of the ellipse in the following case: focus is (1,2)...

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  10. Find the eccentricity, coordinates of the foci equations of directrice...

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  11. In what ratio the point P(-2, y, z) divides the line joining the point...

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  12. The wholesale price index (or price relative) of rice in 2012 compare...

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  13. Q(1) is always equal to :

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  14. During a certain period , the cost of living index number goes from 11...

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  15. Find the Q1 and Q2 for the follwing distrbution . 2,4,3,7,8,9,1,14,18,...

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  16. Compute D3 for the following distribution : {:("Marks",0-10,10-20,20...

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  17. The mean weight of 150 students in a certain class is 60 kg. The mean ...

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  18. The length of 50 ears of barley (to the nearest millimeter) gave the f...

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  19. Find the correlation coefficient r(x,y) if : n = 10 ,sumx=60, sumy=...

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  20. Ten students got the following percentages of marks in Mathematics and...

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