As raizes da equacao r^2-4rcosx=0 de variavel r é(são):
A. r=4cosx v r=0
B. r=arcosx/4
C. r=2√cosx
D.r=0 v r=4
A. r=4cosx v r=0
B. r=arcosx/4
C. r=2√cosx
D.r=0 v r=4
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Verified answer
R² -4cosx r = 0r(r - 4cosx) = 0
r = 0 ou r - 4cosx = 0
r = 4cosx
Letra A