Question

bài: tính

a) (-1,2)^20 : ( 1,2)^17

b) (-1,25)^5 . ( 1,25)^4

giúp e với ạ:(

Answer 1

\(a,=\left(1,2\right)^{20}:\left(1,2\right)^{17}=\left(1,2\right)^3=\dfrac{216}{125}\\ b,=\left(-1,25\right)^5\cdot\left(-1,25\right)^4=\left(-1,25\right)^9=\left(-\dfrac{4}{3}\right)^9=...\)

Answer 2

\(a,\left(-1,2\right)^{20}:\left(1,2\right)^{17}=\left(-1,2\right)^3\)

\(b,\left(-1,25\right)^5.\left(1,25\right)^4=\left(-1,25\right)\)