Question

If F(x,y)=(3x-y, 2x+4y), so F(1,2) equals to:*sorry for my bad english*

Answer 1

Given

`\begin{gathered} f(x,y)=(3x-y,2x+4y) \\ \\ f(1,2)=(3(1)-2,2(1)+4(2)) \\ \\ f(1,2)=(3-2,2+8) \\ \\ f(1,2)=(1,10) \end{gathered}`

Correct option D