an = a1r^(n-1)
a5 = a1 r^(5-1)
-6 =a1 r^4
a2 = a1 r^(2-1)
-48 = a1 r
divide
-6 =a1 r^4
---------------- yields 1/8 = r^3 take the cube root or each side
-48 = a1 r 1/2 = r
an = a1r^(n-1)
an = a1 (1/2)^ (n-1)
-48 = a1 (1/2) ^1
divide by 1/2
-96 = a1
an = -96 (1/2)^ (n-1)
the sum
Sn = a1[(r^n - 1/(r - 1)]
S18 = -96 [( (1/2) ^17 -1/ (1/2 -1)]
=-96 [ (1/2) ^ 17 -1 /-1/2]
= 192 * [-131071/131072]
approximately -192
Answer:
me if you brainlist me
Step-by-step explanation:
Answer:
130ft
Step-by-step explanation:
5x -5.5 = -27.5
5x -5.5 = 27.5 + 10 = 37.5
27.5 x 2 = 55
27.5 + 10 = 37.5 x 2 = 75
55 + 75 = 130 ft
Take 3700 and times it by 6.5 and that should be your answer
