Question

evaluate 2x^-1y^3 if x=2 and y=-1

Answer 1

insert 2 instead of x and insert -1 instead of y

Answer 2

\[2(2)^{-1}-1^{3}\]

Answer 3

like that now what do i do

Answer 4

\[2(2)^{-1}(-1)^{3}\]

Answer 5

\[n^{-1}=\frac{1}{n}\]
\[n^3=n\cdot n\cdot n\]

Answer 6

okay i understand that part i just need help with the combined part

Answer 7

so just multiply and subtract answers you get

Answer 8

(\[1/4* 1^{-3}\]

Answer 9

im confused

Answer 10

\[x^{-1}= 1/x\]
so

Answer 11

wait
\[1/4(1^{3})\]

Answer 12

plugging your numbers