Mister Exam

(1+x^2)^(1/2) canonical form

The teacher will be very surprised to see your correct solution 😉

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The solution

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   ________    
  /      2     
\/  1 + x   = 0
x2+1=0\sqrt{x^{2} + 1} = 0
sqrt(x^2 + 1) = 0