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Real numbers/x^2+(x+1)^2 \geq (x+2)^2 for x \geq 3/Exercise
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Real numbers
Show that for
real numbers
x
≥
3
{\displaystyle {}x\geq 3}
the estimate
x
2
+
(
x
+
1
)
2
≥
(
x
+
2
)
2
{\displaystyle {}x^{2}+(x+1)^{2}\geq (x+2)^{2}\,}
holds.
To solution