What is the sum of the geometric sequence 1, 3, 9, … if there are 11 terms? 29,524
55,987
87,381
88,573

87%

step-by-step explanation:

apex answer

sites:

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.