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Originally Posted by alexandriaruth Hint: for each problem, multiply by the conjugate over itself, for instance, for the first you would multiply by . see if you can take it from there
i have tried that but i keep just rearranging the function and i never get an answer 14x-5/{(sqrt(x^2)+14x-5)+x}
Originally Posted by alexandriaruth i have tried that but i keep just rearranging the function and i never get an answer 14x-5/{(sqrt(x^2)+14x-5)+x} factor out of the square root. you get now in this case, since , we have is positive, and hence, , so we get now divide the top and bottom by and take the limit
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