a) Chứng minh rằng $\forall x\epsilon R$ thì $e^{x}\geq 1+x+\frac{x^{2}}{2!}+\frac{x^{3}}{3!}$
b) Tìm a>0 sao cho $a^{x}\geq 1+x+\frac{x^{2}}{2!}+\frac{x^{3}}{3!}$
Edited by germany3979, 24-07-2013 - 12:13.
Chứng minh rằng $\forall x\epsilon R$ thì $e^{x}\geq 1+x+\frac{x^{2}}{2!}+\frac{x^{3}}{3!}$
Started By germany3979, 24-07-2013 - 09:20
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