Find the energies of the signals illustrated in fig p1.1-1. comment on the effect on energy of sign change, time shifting, or doubling of the signal. what is the effect on the energy if the signal is muliplied by k? all figures are square wave with different magnitudes

guess at question:

a vertical line intersects the graph of g(x,y) = 0 at two points. what conclusion follows about the function f(x) implicitly defined by g(x,f(x)) = 0?

the domain of f(x) cannot include the x coordinate of any such vertical line.

informally, f(x) is not a function, and

g(x,y)=0 cannot be solved for y uniquely.

the relation r = {(x,y) such that g(x,y) = 0} is a function if

for all (a,b) ∊ r and (c,d) ∊ r, a=c implies b=d.

step-by-step explanation:

for future students the answer is b

hope i

-lavira: )

answer: no

step-by-step explanation: because the big angle will spread away the 2 side that it is on and make the opposite side even longer.