4 mũ 3 : 2 mũ 4 bằng

64:16=4

\(4^3:2^4\)

\(=\left(2^2\right)^3:2^4\)

\(=2^6:2^4\)

\(=2^2\)

\(=4\)

1.2+2.3+3.4.....+n.(n+1)=A 
Ta có 
3.A=1.2.(3-0)+2.3.(4-1)+3.4.(5 -2)...+ n.(n+1) . ((n+2) - (n-1)) 
3.A=1.2.3+2.3.4+3.4.5+...+ (n-1) . n. (n+1)+ n. (n+1). (n+2) - 
       =0.1.2 -1.2.3 -2.3.4 -3.4.5 -...(n-1)n(n+1) 
3A=n.(n+1).(n+2) 
A=\(\frac{n\left(n+1\right)\left(n+2\right)}{3}\)

Thay n = 96 ta có

A=\(\frac{96\left(96+1\right)\left(96+2\right)}{3}=304192\)

p/.s tham khảo nha

hổng có bt

hncfuidrnhjhcfnjudcfnhcfuhn

ngu thế Đó Bảo Ly

k nha 

Ta có:  7200 : [ 200 + ( 33600 : x ) - 500 ] = 4

                        [ 200 + ( 33600 : x ) - 500 ] = 1800

                        200 + ( 33600 : x ) = 2300

                        33600 : x = 2100

                         x = 16

 7200 : [ 200 + ( 33600  : x ) - 500 ] = 4

            [ 200 + ( 33600  : x ) - 500 ] = 7200 : 4

            [ 200 + ( 33600  : x ) - 500 ] = 1800

             ( 33600  : x ) - 500              = 1800 - 200

             ( 33600  : x ) - 500              = 1600

                33600  : x                         = 1600 + 500

                33600 : x                          = 2100

                             x                          = 33600 : 2100

                             x                          = 16

hok tốt

9²¹<729⁷¹

phai giai nua ban a

a, 51 + ( 432 - 4x ) : 3 = 191

\(\Rightarrow\) (432 - 4x ) : 3 = 140

\(\Rightarrow\) 432 - 4x = 420

\(\Rightarrow\) 4x = 12

\(\Rightarrow\) x=3

51 + ( 432 - 4x ) : 3 = 191

        ( 432 - 4x ) : 3 = 191 - 51

        ( 432 - 4x ) : 3 = 140

          432 - 4x        = 140 x 3

          432 - 4x        =  420

                    4x       = 420 - 417

                    4x       = 3 

                      x       = 3 : 4

                      x       = \(\frac{3}{4}\)

             Vậy   x  = \(\frac{3}{4}\)

=132

k mick nhé

cac ban giup minh lam voi dem nay minh phai di hoc

Bo may la binh day k di hieu ashdbfgbgygygggydfsghuyfhdguuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu3

Ta gọi số cần tìm là a

Ta có:a:15 dư 2 ---> a-2 chia hết(dấu) cho 15

        a:32 dư 2----> a-2 chia hết cho 32

       a:75 dư 2----->a-2 chia hết cho 75

Suy ra a thuộc BC{15,32,75}

Ta có: 15 = 3.5

           32=2⁵.1

           75=3.5²

BCNN(15,32,75)=3.2⁵.5²=1200

Suy ra a-5 thuộc B(1200)

Suy ra a-5 thuộc(1200 , 2400, 3600,4800,...)

Suy ra a thuộc(1202,2402,3602,4802,...)

Do a nhỏ nhất nên a =1202

Vậy số đó là:1202

\(\frac{21^2.14.125}{35^3.6}\)

\(=\frac{7^2.3^2.2.7.5^3}{7^3.5^3.2.3}\)

\(=\frac{7^3.3^2.2.5^3}{7^3.5^3.2.3}\)

\(=3\)

Bo may la binh day k di hieu ashdbfgbgygygggydfsghuyfhdguuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu3