3z^2-2z+4i=0
$x^{4}$- 5$x^{2}$ + 4
(3n+2)(n+3)
$x^{2}$ +18x+30=2 $\sqrt{xx + 18x+45\}$
partial fraction of 1/x^2-y^2
18. What is the focal length of a concave lens with a focal of 16cm in contact with a convex lens with a focal length of 28 cm? is...
Determine a negação da proposição: “Pedro viaja e Ana estuda”.
a) Pedro viaja ou Ana estuda.
b) Pedro não viaja e Ana estuda. ...
tan -1 value
19. Two power lenses, -19 D and +6 D are in contact with each other. What is the focal length of the combination of these lenses?
