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If (z-1)/(z+1) is purely imaginary, then...

If `(z-1)/(z+1)` is purely imaginary, then `|z|=`

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OSWAAL PUBLICATION-SAMPLE PAPER 8-EXERCISE
  1. How many words with or without meaning can be made from the letter of ...

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  2. How many words, with or without meaning can be made from the letters o...

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  3. If (z-1)/(z+1) is purely imaginary, then |z|=

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  4. Find the term independent of x in the expansion of (3x^2-1/(2x^3))^10.

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  5. For what value of n,(a^(n+1)+b^(n+1))/(a^n+b^n) is the arithmetic mean...

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  6. In a class of 100 students 60 drinks tea. 50 drink coffee and 30 drink...

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  7. In a class of 100 students 60 drinks tea. 50 drink coffee and 30 drink...

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  8. Find the derivative of function x^n with respect to 'x' from first pri...

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  9. Find the co-ordinate of the focus ,equation of the directrix and lengt...

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  10. Insert 6 numbers between 3 and 24 so that the resulting sequence is an...

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  11. Verify by the method of contradiction that sqrt 11 is irrational.

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  12. 4 persons are selected at random from a group of 3 men , 2 women and...

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  13. 4 persons are selected at random from a group of 3 men , 2 women and...

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  14. Defiine a polynimial function.If the function from f:R rarr R is defin...

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  15. Prove that by using the principle of mathematical induction for all n...

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  16. A box contains 5 different red and 6 different white balls.In how many...

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  17. Using binomial theorem. Prove that 6^n-5n always leaves remainder 1 wh...

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  18. Derive a formula for the angle between two lines with slope m1 and m2....

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  19. If A+B+C=pi prove that "tan"A/2"tan"B/2+"tan"B/2"tan"C/2+"tan"C/2"tan"...

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  20. Find the sum of 'n' terms of 1.2 +2.3+3.4+4.5+……

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