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hartnn
 one year ago
Best ResponseYou've already chosen the best response.2hint : \((x1)=(\sqrt x)^21^2 \) now use the difference of squares \(a^2b^2=(a+b)(ab)\)

hartnn
 one year ago
Best ResponseYou've already chosen the best response.2\((x1)=(\sqrt x)^21^2=(\sqrt x1)(\sqrt x+1)\) got this ? what gets cancelled ?

onegirl
 one year ago
Best ResponseYou've already chosen the best response.1okay the sqrt(x)  1 gets cancelled

hartnn
 one year ago
Best ResponseYou've already chosen the best response.2yes, you can directly put x=1 now.

onegirl
 one year ago
Best ResponseYou've already chosen the best response.1okay so i substitute x = 1 into sqrt(x)  1?

hartnn
 one year ago
Best ResponseYou've already chosen the best response.2no....that got cancelled....what remains ?

onegirl
 one year ago
Best ResponseYou've already chosen the best response.1what remains is (x  1)

hartnn
 one year ago
Best ResponseYou've already chosen the best response.2but we wrote x1 as \((x1)=(\sqrt x)^21^2=(\sqrt x1)(\sqrt x+1)\)

hartnn
 one year ago
Best ResponseYou've already chosen the best response.2\(\dfrac{\sqrt x1}{x1}=\dfrac{\sqrt{x}1}{(\sqrt x1 )(\sqrt x +1)}=\dfrac{1}{\sqrt x+1}\) got this ? now put x=1

hartnn
 one year ago
Best ResponseYou've already chosen the best response.2i get the same, its correct.
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