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Bài 6: Lũy thừa của một số hữu tỉ (tiếp theo...)
Các câu hỏi tương tự
a) \(\dfrac{5^5}{5^x}=5^{18}\)
b) \(\dfrac{2^{4-x}}{16^5}=32^6\)
c) \(\dfrac{2^{2x-3}}{4^{10}}=8^3.16^5\)
d) \(\dfrac{2^3}{2^x}=4^5\)
e) \(9.5^x=6.5^6+3.5^6\)
f) \(7.2^x=2^9+5.2^8\)
Tìm x,biết: a)x : \((\dfrac{3}{4})^{3} = (\dfrac{3}{4})^{2} \) b) \(\dfrac{2}{5}^{5} . x = \dfrac{2}{5}^{8}\)
tìm x biết: x:\((\dfrac{3}{4})^3=(\dfrac{3}{4})^2\)
b) \((\dfrac{2}{5})^5.x=(\dfrac{2}{5})^8\)
x:[ \(\dfrac{8}{5}\) . (\(\dfrac{2}{3}\))\(^2\) - \(\dfrac{2}{5}\) ] = \(\dfrac{15}{7}+\dfrac{6}{5}\) [(2\(\dfrac{1}{7}\))\(^2\) - \(\dfrac{50}{49}\) ]
tìm x
giúp mk nhó
tìm x biết
a) \(\dfrac{2}{5}-\left(\dfrac{1}{10}-x\right)=\left(\dfrac{-2}{5}-\dfrac{1}{2}\right)^2\)
b) \(\dfrac{2}{5}-\dfrac{3}{5}\left(x-2\right)=\left(\dfrac{-1}{2}\right)^3-\left(\dfrac{3}{4}\right)^3.\left(-2\right)^2\)
BT4:Tìm x, biết:
a) \(x\div\left(\dfrac{3}{4}\right)^3=\left(\dfrac{3}{4}\right)^2\)
b) \(\left(\dfrac{2}{5}\right)^5\div x=\left(\dfrac{2}{5}\right)^8\)
Tìm x, biết:
a) x : \(\left(\dfrac{3}{4}\right)^3\)= \(\left(\dfrac{3}{4}\right)^2\) b) \(\left(\dfrac{2}{5}\right)^5\). x = \(\left(\dfrac{2}{5}\right)^8\)
Tìm x , biết
a) x : (\(\dfrac{3}{4}\)) 3 = (\(\dfrac{3}{4}\))2
b) (\(\dfrac{2}{5}\))5 . x = (\(\dfrac{2}{5}\)) 8
Bài 1: Tìm x:
\(\left(x+\dfrac{2}{3}\right)^5=\left(x+\dfrac{2}{5}\right)^3\)
Bài 2: Tìm x,y\(\in\) N biết:
\(\dfrac{27^x}{3^{2x-y}}=243\) và \(\dfrac{25^x}{5^{x+y}}=125\)