Question

Answer 1

Câu 1: C

Câu 2: C

Câu 3: B

Câu 4: C

Câu 6: \(\dfrac{9}{5}\cdot x=\left(\dfrac{9}{5}\right)^3\)

=>\(x=\left(\dfrac{9}{5}\right)^3:\dfrac{9}{5}=\left(\dfrac{9}{5}\right)^2=\dfrac{81}{25}\)

=>Chọn A

Câu 7:

\(A=\left[\left(-\dfrac{1}{5}\right)^4\right]^2=\left(-\dfrac{1}{5}\right)^{4\cdot2}=\left(-\dfrac{1}{5}\right)^8=B\)

=>Chọn C

Answer 2

`1.C`

`2.C`

`3.B`

`4.C`

`6.A`

`7.C`

Answer 3

1.B

2.C

3.B

4.C

5.D

6.A

7.C