Subject :IMO Class : Class 7
Class : Class 10
IT SHOULD NOT BE A,IT SHOULD D BECAUSE EVERY TIME WE START FROM 0.HERE,IN THIS QUESTION WHEN WE START FROM 0 THAT IS -4 AND THEN +2.SO,CORRECT ANSWER IS D.
Class : Class 7
The correct answer/option is D and the solution too is provided in the solution icon.
Subject :IMO Class : Class 5
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Subject :IMO Class : Class 4
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Subject :IMO Class : Class 2
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Subject :IMO Class : Class 3
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Subject :IMO Class : Class 8
Ans 1:
Class : Class 9
x+1/x=4
So,(x+1/x)^2=4^2=16
x^2+2+1/x^2=16
Since (x-1/x)^2=x^2-2+1/x^2,
It will be=(x+1/x)^2-4=16-4=12
So, (x-1/x)=√12
Which is equal to √2×2×3
=2√3
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Subject :IMO Class : Class 3
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Subject :IMO Class : Class 6
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Subject :IMO Class : Class 4
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Subject :IMO Class : Class 4