Write the coordinates of the vertices after a reflection across the line x = –1 C(-9, 1)
→
C′(
,
)
D(-1, 1)
→
D′(
,
)
E(-1, 10)
→
E′(
,
)
F(-9, 10)
→
F′(
,
)

Solve: 25 points find the fifth term of an increasing geometric progression if the first term is equal to 7−3 √5 and each term (starting with the second) is equal to the difference of the term following it and the term preceding it.