(x+2^4).7^3=2.7^4 giúp mikkkkkkkkkkkkkkkkkkkkkkkkkkkk
2 câu trả lời
`(x+2⁴).7³=2.7⁴`
`⇔x+2⁴=2.7⁴:7³`
`⇔x+2⁴=2.7`
`⇔x+16=14`
`⇔x=14-16`
`⇔x=-2`
Vậy `x=-2`
${(x+2^4)}$ ${.}$ ${7^3}$ ${=}$ ${2}$ ${.}$ ${7^4}$
${(x+2^4}$ ${=}$ $\dfrac{7^4×2}{7^3}$
${(x+2^4)}$ ${=}$ ${7}$ ${.}$ ${2}$
${(x+2^4)}$ ${=}$ ${14}$
${x}$ ${+}$ ${16}$ ${=}$ ${14}$
${x}$ ${=}$ ${14}$ ${-}$ ${16}$
${x}$ ${=}$ ${(-2)}$