If \( a, b, c \) are positive real numbers, then prove that
\( \mat... VIDEO
If \( a, b, c \) are positive real numbers, then prove that
\( \mathrm{P} \)
\[
\frac{a}{b+c}+\frac{b}{c+a}+\frac{c}{a+b} \geq \frac{3}{2}
\]
W)
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