D
duytan_bmt1996


Giải bất PT:
$2^{sinx} + 2^{tanx}$ \geq $2^{x+1}$, \forall $0 < x<\frac{\pi}{2}$

$2^{sinx} + 2^{tanx}$ \geq $2^{x+1}$, \forall $0 < x<\frac{\pi}{2}$
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