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If x+iy=(a+ib)/(a-ib), prove that x^(2)+...

If `x+iy=(a+ib)/(a-ib)`, prove that `x^(2)+y^(2)=1`

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OSWAAL PUBLICATION-SAMPLE PAPER 4-EXERCISE
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  14. Let f(x)=x^2" and "g(x)=2x+1 be two real values functions, find (f+g...

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  15. Let f(x)=x^2" and "g(x)=2x+1 be two real values functions, find (f-g...

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  16. Let f(x)=x^(2) and g(x)=2x+1 be two real functions. Find (f+g) (x), (f...

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  19. Solve:2x^2+sqrt 3x+1=0

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  20. Find r, if 5""^(4)P(r)=6""^(5)P(r-1)

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