Question

[Nguyen thi bích ngọc]

Bài 1:Viết gọn các biểu thức sau bằng cách dùng lũy thừa:

a)7.7.7

b)7.35.7.25

c)2.3.8.12.24

d)12.12.2.12.6

e)25.5.4.2.10

f)2.10.10.3.5.10

g)a.a.a+b.b.b.b

h)x.x.y.y.x.y.x

Answer 1

[M r . V ô D a n h]

a. 7³

b. 7.35.7.25 = 7 . 5 . 7 . 7 . 5 . 5 = 7³ . 5³

c. 2.3.8.12.24 = 2.3.2.2.2.2.2.3.2.2.2.3 = 2⁹ . 3³

d. 12.12.2.12.6 = 3.2.2.3.2.2.2.3.2.2.2.3 = 3⁴ . 2⁹

e. 25.5.4.2.10 = 5.5.5.2.2.2.5.2 = 5⁴ . 2⁴

f. 2.10.10.3.5.10 = 2.2.5.2.5.3.5.2.5 = 2⁴ . 5⁴ . 3

g. a.a.a+b.b.b.b = a³ + b³

h. x.x.y.y.x.y.x = x⁴ . y³

Answer 2

[David Nguyễn]

a.\(7^3\)

b.\(7^3\cdot5^3\)

c.\(2^9\cdot3^3\)

d.\(2^8\cdot3^4\)

e.\(2^4\cdot5^4\)

f.\(2^4\cdot3\cdot5^4\)

g.\(a^3+b^4\)

h.\(x^4\cdot y^3\)