Toán Lớp 7: 8 mũ 7- 2 mũ 18 chia hết cho 14
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Toán Lớp 7: 8 mũ 7- 2 mũ 18 chia hết cho 14
Comments ( 2 )
=$8^{7}$ – $2^{18}$
=$(2^{3})$$^{7}$ – $2^{18}$
=$2^{21}$ – $2^{18}$
=$2^{17}$ xx ($2^{4}$ – 2)
=$2^{17}$ xx 14 ⋮ 14
⇔$8^{2}$ – $2^{18}$ ⋮ 14
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