[(27^4:9^5)+(625^3:125^4)]-2^3

=[(531441:59049)+(244140625:244140625)]-8

=[9+1]-8

=10-8

=2

Nếu dk thì cko mik nhoa

kết quả bằng 17

cactoon

\(50-\left[30-\left(9-4\right)^2\right]=50-\left(30-5^2\right)=50-\left(30-25\right)=50-5=45\)

\(50-[30-(9-4)^2]\)

\(50-[30-25]\)

\(50-5=45\)

=2^4.5-{131-(13-4)^2}

=80-{131-9^2}

=80-50

=30

HT

=16.5-{131-9^2}

=80-{131-81}

=80-50

=30

__HT__

Theo đề bài ta có : 

`2^4 xx 5 - {131-(13-4)^2}`

`=16 xx5 - { 131 - 9^2 }`

`= 16 xx5 -{131-81}`

`=16xx5-50`

`=80-50`

`=30`

a)\(x^{15}=x\Rightarrow x\in\left\{0;1\right\}\)                                            d)Là ý b

b)\(\left(2x+1\right)^3=125\\ \left(2x+1\right)^3=5^3\Rightarrow2x+1=5\\ 2x=4\\ x=2\)                       e)\(\left(x-3\right)^2=25\\ \Rightarrow\left(x-3\right)^2=5^2\\ \Rightarrow\hept{\begin{cases}x-3=5\Rightarrow x=8\\x-3=-5\Rightarrow x=-2\end{cases}}\)

c)\(\left(x-5\right)^4=\left(x-5\right)^6\\ \Rightarrow x-5\in\left\{0;1\right\}\Rightarrow x\in\left\{5;6\right\}\)

Chăc chết      \(\left(3.4.2^{16}\right)^2:\left(11.2^{13}.4^{11}-16\right)^{19}\)

o nung qua nung qua de

\(3^2\left(x+4\right)-5^2=5.2^2\)

\(9\left(x+4\right)-25=5.4\)

\(9\left(x+4\right)-25=20\)

\(9\left(x+4\right)=20+25\)

\(9\left(x+4\right)=45\)

\(X+4=45:9\)

\(x+4=5\)

\(x=5-4\)

\(x=1\)

Vậy x=1