64 nha bn

2^0.2^9:2^3

=2^9:2^3

=2^6=64

 k mik nha

64 nha ban

=1024.59049-1024.19683

=1024.(59049-19683)

=1024.39366

=40310784/=512.50049

                   =30233088

cảm ơn bạn đã giúp

\(\left(\dfrac{1}{4}\right)^{2n}=\left(\dfrac{1}{8}\right)^2\)

\(\Rightarrow\left(\dfrac{1}{2}\right)^{2.2n}=\left(\dfrac{1}{2}\right)^{3.2}\)

\(\Rightarrow\left(\dfrac{1}{2}\right)^{4n}=\left(\dfrac{1}{2}\right)^6\)

\(\Rightarrow4n=6\)

\(\Rightarrow n=\dfrac{6}{4}=\dfrac{3}{2}\)

n = 3/2

mũ 2.

2^x.2=8
2^x   =8:2
2^x   =4
2^x   =2^2
=>x  =2

2^x.2=8

=>2^x=4

=>2^x=2²

=>x=2

1/2 mũ n = 1/2 mũ 6

Vậy x = 6

\(\left(\dfrac{1}{2}\right)^n=\left(\dfrac{1}{8}\right)^2\)

\(=>\left(\dfrac{1}{2}\right)^n=\left[\left(\dfrac{1}{2}\right)^3\right]^2\)

\(=>\left(\dfrac{1}{2}\right)^n=\left(\dfrac{1}{2}\right)^6\)

\(\Rightarrow n=6\)

\(\left(\dfrac{1}{2}\right)^n=\left(\dfrac{1}{8}\right)^2 \Rightarrow\left(\dfrac{1}{2}\right)^n=\dfrac{1}{64} \Rightarrow\left(\dfrac{1}{2}\right)^n=\left(\dfrac{1}{2}\right)^6\Rightarrow n=6\)

a = 2⁰ + 2² + 2⁴ + ... + 2¹⁸

= 1 + 2² + 2⁴ + ... + 2¹⁸

= ( 1 + 2² ) + ( 2⁴ + 2⁶ ) + ... + ( 2¹⁶ + 2¹⁸ )

= 5 + 2⁴( 1 + 2² ) + ... + 2¹⁶( 1 + 2² )

= 5.1 + 2⁴.5 + ... + 2¹⁶.5

= 5( 1 + 2⁴ + ... + 2¹⁶ ) chia hết cho 5 ( đpcm )

Ta có:

\(A=\frac{3^{10}.11+3^{10}.5}{3^9.2^4}=\frac{3^{10}.\left(11+5\right)}{3^9.16}\)

\(=\frac{3^{10}.16}{3^9.16}=\frac{3.1}{1.1}=3\)

Vậy giá trị biểu thức A là 3

de lam

G = 21 mũ 2 . 14 . 125 trên 35 mũ 5 . 6\

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