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Lösung 2.3:7c

Aus Online Mathematik Brückenkurs 1

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If we complete the square,

x2+x+1=x+212−212+1=x+212+43 

we see on the right-hand side that we can make the expression arbitrarily large simply by choosing x+21 sufficiently large. Hence, there is no maximum value.

Von „http://wiki.sommarmatte.se/wikis/2009/bridgecourse1-TU-Berlin/index.php/L%C3%B6sung_2.3:7c“