Question

giup minh. Thanks

toi nay mik can nop.(23/9/2021)

Answer 1

Bài 47:

a: \(\left(-3\right)^2\cdot\left(-3\right)^3=\left(-3\right)^5=-243\)

b: \(\left(-0.25\right)^3:\left(-0.25\right)=\left(-0.25\right)^2=0.0625\)

c: \(\left(\left(-0.5\right)^2\right)^3=0.5^6=\dfrac{1}{64}\)

Answer 2

47. 

a. (-3)².(-3)³

= (-3)^{2 + 3}

= (-3)⁵

= -243

 

b. (-0,25)³ : (-0,25)

= (-0,25)^{3 - 1}

= (-0,25)²

= 0,0625

c. \(\left[\left(-0,5\right)^2\right]^3=\left(-0,5\right)^{2.3}=\left(-0,5\right)^6=0,015625\)

d. (-0,01)²

= 1