Question

Viết gọn dưới dạng lũy thừa
a) ( 625 : 5 )² : ( 125 . 5 )
b) ( 81 . 27 . 9 ) : ( 243 . 3 )
d) 1000 . 200 . 40 .250

Answer 1

a. =(5⁴:5):(5².5)

=5⁵:5³

=5²

b.= (3⁴.3³.3²):(3⁵.3)

=3⁹:3⁶

=3³

d. = 8.125.8.25.8.5.25.2.5

= 2³.5³.2³.5².2³.5.5².2.5

=2¹⁰.5⁹

đúng nha

Answer 2

a; ( 625 : 5) : ( 125 . 5)

 =  ( 5^4 : 5) :  ( 5^3 . 5)

= 5^3 : 5^4

= 1/5

b; (8 1 . 27 . 9 ) : ( 243 . 3)

= ( 3^4 . 3^3 . 3^2) : ( 3^4 . 3)

= 3^9 : 3^ 5

=3^4

c, 1000 x 200 x 40 x 25 

= 1000 x ( 40x 250) x 200

= 1000 x 10000 x 200

= 2000000000