kết quả bằng 17

cactoon

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

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

\(50-[30-25]\)

\(50-5=45\)

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

o nung qua nung qua de

viết hẳn ra đi đừng viết mở ngoặc rồi đóng ngoặc

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

\(\left(5.2^2-20\right):\left(5+3^2:6\right)\\ =\left(5.4-20\right):\left(5+9:6\right)\\ =\left(20-20\right):\left(5+\dfrac{3}{2}\right)\\ =1:\dfrac{13}{2}=\dfrac{2}{13}\)

(5*2^2-20):5+3^2/6

=(20-20):5+9/6

=3/2

707: [(2^x -5) + 74] = 4² - 3²

(2^x -5) + 74 = 101

2^x - 5 + 74  = 101

2^x + 69 = 101

2^x = 32 = 2⁵

=> x = 5

707: [(2^x -5) + 74] = 4² - 3²

(2^x -5) + 74 = 101

2^x - 5 + 74  = 101

2^x + 69 = 101

2^x = 32 = 2⁵

=> x = 5

707 : [(2^x-5)+74] = 4²-3²

707 : [(2^x-5)+74]= 16 - 9

707 : [(2^x-5)+74]= 7

         (2^x-5)+74 = 707 :7

          (2^x-5)+74= 101

          (2^x-5)      =101-74

          (2^x-5)     = 27

          2^x            = 27+5

         2^x          =32

        2^x             = 2⁵(vì 32=2⁵)

=> x=5