Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(\begin{array}{l}0,49 = {\left( {0,7} \right)^2};\\\,\frac{1}{{32}} =\frac{1^5}{2^5}={\left( {\frac{1}{2}} \right)^5};\\\,\frac{{ - 8}}{{125}} =\frac{(-2)^3}{5^3}= {\left( {\frac{{ - 2}}{5}} \right)^3};\end{array}\)
\(\frac{{16}}{{81}} =\frac{4^2}{9^2}= {\left( {\frac{4}{9}} \right)^2} (hoặc \,\frac{{16}}{{81}} =\frac{2^4}{3^4}= {\left( {\frac{2}{3}} \right)^4});\\\,\frac{{121}}{{169}} =\frac{11^2}{13^2}= {\left( {\frac{{11}}{{13}}} \right)^2}\)
a: \(1=4^0\)
\(4=4^1\)
\(16=4^2\)
\(256=4^4\)
b: \(\dfrac{1}{4}=4^{-1}\)
\(\dfrac{1}{64}=4^{-3}\)
\(\dfrac{1}{256}=4^{-4}\)
\(\dfrac{1}{16}=4^{-2}\)
\(\dfrac{1}{1024}=4^{-5}\)
0,25 = (0,5)2
\(\dfrac{1}{49}\) = (\(\dfrac{1}{7}\))2
- \(\dfrac{27}{125}\) = (- \(\dfrac{3}{5}\))3
\(\dfrac{81}{16}\) = ( \(\dfrac{9}{4}\))2
\(\dfrac{169}{196}\) = (\(\dfrac{13}{14}\))2
\(\dfrac{9}{25}=\left(\dfrac{3}{5}\right)^2\)
\(\dfrac{8}{27}=\left(\dfrac{2}{3}\right)^3\)
\(\dfrac{-125}{64}=\left(-\dfrac{5}{4}\right)^3\)
\(0=0^2\)
\(-27=\left(-3\right)^3\)
\(\dfrac{16}{81}=\left(\dfrac{2}{3}\right)^4\)
a) (x-2)\(^4\) = 256
(x-2)\(^4\) = \(4^4\)
x-2=4
x=4+2
x=6
b) \(\dfrac{x^4}{256}=81\)
\(\dfrac{x^4}{4^4}=81\)
\(\dfrac{x}{4}=81\)
x =81.4
x = 324
c) \(125\left(x+\dfrac{4}{5}\right)^3=729\)
\(\left(x+\dfrac{4}{5}\right)^3=729:125=\dfrac{729}{125}\)
\(\left(x+\dfrac{4}{5}\right)^3=\left(\dfrac{9}{5}\right)^3\)
\(x+\dfrac{4}{5}=\dfrac{9}{5}\)
x = \(\dfrac{9}{5}-\dfrac{4}{5}\)
x \(=1\)
2 Viết dưới dạng luỹ thừa
a) \(-729=\left(-9\right)^3.\)
b) \(-64=\left(-4\right)^3.\)
c) \(-125=\left(-5\right)^3.\)
d) \(625=25^2=\left(-25\right)^2=5^4=\left(-5\right)^4.\)
e) \(256=16^2=\left(-16\right)^2.\)
f) \(196=14^2=\left(-14\right)^2.\)
g) \(169=13^2=\left(-13\right)^2.\)
h) \(121=11^2=\left(-11\right)^2.\)
i) \(144=12^2=\left(-12\right)^2.\)
Chúc bạn học tốt
1,
4339-1737=4338.43-1736.17
=(...9)19.43-(...9)18.17
=(...9).43-(...1).17
=(...7)-(...7)=(...0) ⋮ 10 (vì chữ số tận cùng là 0)
2,
-729= -93
-64= -43
-125= -53
625= 54= -54
256= 162= -162
196= 142= -142