1.403, 1.404 под буквами "а". Created by BJIADA. algebra-ru

1.403, 1.404 под буквами "а"...

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$y= \frac{3x}{2x+1} + \frac{5x-1}{3x-1} 
\\\
y( \frac{1}{2} )= \frac{3\cdot \frac{1}{2} }{2\cdot \frac{1}{2} +1} + \frac{5\cdot \frac{1}{2} -1}{3\cdot \frac{1}{2} -1} =\frac{\frac{3}{2} }{1 +1} + \frac{\frac{5}{2} -1}{ \frac{3}{2} -1} =
\frac{\frac{3}{2} }{2} + \frac{\frac{3}{2} }{ \frac{1}{2}} =\frac{3}{4} } + \frac{3}{1}=3 \frac{3}{4} =3.75$

$f(x)=x^2-3
\\\
f(1- \sqrt{3} )+f(1+\sqrt{3} )=(1-\sqrt{3} )^2-3+(1+\sqrt{3} )^2-3=
\\\
=1-2\sqrt{3} +3-3+1+2\sqrt{3} +3-3=2$

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