a) 3^(4-2)=3²

b) 2⁽⁴⁺²⁾=2⁶

c) 2^4.2=2⁸
 

a,3²

b,2²

c,2⁸

    \(\overline{34x5y}\) ⋮ 9

⇔ 3 + 4 + x + 5 + y  ⋮ 9

⇔ 3 + x + y ⋮ 9

⇔ x + y = 6 hoặc x + y = 15

th x + y = 6

      x =1; y = 5;

      x= 2 ; y = 4;

      x =  3 ; y = 3

th x + y = 15

     x = 6; y = 9

    x = 7;  y = 8

      x= 

Tổng(1 . 2 . 3 . 4 . 5 . 6 + 6930) có chia hết cho 2 ; 3 ; 5 ; 9

\(44\times17+29\times56+13\times44+56\)

\(=44\times\left(17+13\right)+56\times\left(29+1\right)\)

\(=\left(44\times30\right)+\left(56\times30\right)\)

\(=30\times\left(44+56\right)\)

\(=30\times100\)

\(=3000\)

các bn giúp em với ạ em cần gấp

11³.11²-11⁵.11:11.3+10000:5-1+1.2

=11⁵-11⁵.11:11.3+10000:5-1+1.2

=0.11:11.3+10000:5-1+1.2

=0:11.3+2000-1+2

=0.3+2000-1+2

=0+2000-1+2

=2000-1+2

=1999+2

=2001

-320101 =))

Tìm x

\(\left(\text{4x+1}\right)^2-8=1+4^2\)

\(\left(4x+1\right)^2-8=1+16\)
\(\left(4x+1\right)^2-8=17\)

\(\left(4x+1\right)^2=17+8\)

\(\left(4x+1\right)^2=\pm25\)

TH1: \(\left(4x+1\right)^2=25\)

\(=>4x+1=5\)

\(=>4x=5-1=4\)

\(=>x=4:4=1\)

TH2:\(\left(4x+1\right)=-25\)

\(4x+1=-5\)

\(4x=-5-1=-6\)

\(x=-6:4=-\dfrac{3}{2}\)

Vậy \(x\in\left\{1;-\dfrac{3}{2}\right\}\)