Rút gọn phân số: $\frac{2^{16}-2^{14} } {2^{18}- 2^{16}}$ 23/11/2021 Bởi Eva Rút gọn phân số: $\frac{2^{16}-2^{14} } {2^{18}- 2^{16}}$
$\dfrac{2^{16}-2^{14}}{2^{18}-2^{16}}$ $=\dfrac{2^{14}.(2^2-1)}{2^{16}.(2^2-1)}$ $=\dfrac{2^{14}}{2^{16}}$ $=\dfrac{1}{4}$ Bình luận
$\text { Đáp án: }$ $\frac {2¹⁶–2¹⁴}{2¹⁸–2¹⁶}$ $\text {=}$ $\frac {2².2¹⁴–2¹⁴}{2².2¹⁶–2¹⁶}$ $\text {=}$ $\frac {2¹⁴.(2²–1)}{2¹⁶.(2²–1)}$ $\text {=}$ $\frac {2¹⁴}{2¹⁶}$ $\text {=}$ $\frac {2¹⁴}{2¹⁴.2²}$ $\text {=}$ $\frac {1}{2²}$ $\text {=}$ $\frac {1}{4}$ Bình luận
$\dfrac{2^{16}-2^{14}}{2^{18}-2^{16}}$
$=\dfrac{2^{14}.(2^2-1)}{2^{16}.(2^2-1)}$
$=\dfrac{2^{14}}{2^{16}}$
$=\dfrac{1}{4}$
$\text { Đáp án: }$
$\frac {2¹⁶–2¹⁴}{2¹⁸–2¹⁶}$
$\text {=}$ $\frac {2².2¹⁴–2¹⁴}{2².2¹⁶–2¹⁶}$
$\text {=}$ $\frac {2¹⁴.(2²–1)}{2¹⁶.(2²–1)}$
$\text {=}$ $\frac {2¹⁴}{2¹⁶}$
$\text {=}$ $\frac {2¹⁴}{2¹⁴.2²}$
$\text {=}$ $\frac {1}{2²}$
$\text {=}$ $\frac {1}{4}$