dervast
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Hi i have to read mathematics over 7 years and now i can't even solve a simple equation
I hav3e the following
x(t)=-3t for t<0 and
x(t)=t t>=0
I want to calculate the x(t)+x(-t) for t<0 firstloy and then for t>=0
For t<0
x(t)+x(-t)=-3t+t (x(t)=-3t cause x is negative x(-t)=t cause the negative of the negative -t is the t which is t)
The problem is that my teachers book says that x(t)+x(-t)=-3t-t and i can't understand how he calculates that
Now for t>=0 x(t)+x(-t)=t-3t (x(t)=t cause it is positive and x(-t)=-3t cause the negative of t>=0 is the t<0 which makes x(t)=-3t..
My teacher again argues with me cause he calculates in his note
x(t)+x(-t) as =t+3t
So what i am doing wrong ?:(
Homework Statement
I hav3e the following
x(t)=-3t for t<0 and
x(t)=t t>=0
I want to calculate the x(t)+x(-t) for t<0 firstloy and then for t>=0
Homework Equations
The Attempt at a Solution
For t<0
x(t)+x(-t)=-3t+t (x(t)=-3t cause x is negative x(-t)=t cause the negative of the negative -t is the t which is t)
The problem is that my teachers book says that x(t)+x(-t)=-3t-t and i can't understand how he calculates that
Now for t>=0 x(t)+x(-t)=t-3t (x(t)=t cause it is positive and x(-t)=-3t cause the negative of t>=0 is the t<0 which makes x(t)=-3t..
My teacher again argues with me cause he calculates in his note
x(t)+x(-t) as =t+3t
So what i am doing wrong ?:(