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begin mathsize 14px style limit as x rightwards arrow infinity of open parentheses open parentheses 5 x minus 1 close parentheses minus square root of 25 x squared plus 5 x minus 7 end root close parentheses equals... end style  

Jawaban:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell limit as x rightwards arrow infinity of left parenthesis open parentheses 5 x minus 1 close parentheses minus square root of 25 x squared plus 5 x minus 7 end root right parenthesis end cell row blank equals cell limit as x rightwards arrow infinity of square root of open parentheses 5 x minus 1 close parentheses open parentheses 5 x minus 1 close parentheses end root minus square root of 25 x squared plus 5 x minus 7 end root end cell row blank equals cell limit as x rightwards arrow infinity of square root of 25 x squared minus 10 x plus 1 end root minus square root of 25 x squared plus 5 x minus 7 end root end cell row blank equals cell fraction numerator b minus q over denominator 2 a end fraction end cell row blank equals cell fraction numerator 1 minus left parenthesis negative 5 right parenthesis over denominator 2 cross times 25 end fraction end cell row blank equals cell 5 over 50 end cell end table end style  

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