Answer:
Step-by-step explanation:
The nth term of a geometric sequence is given by the formula
[tex]Tn=ar^n^-^1[/tex]
Given data
first term a1=5 and
common ratio r=-3
n= 5
[tex]T5= 5*3^5^-^1\\T5= 5*3^4\\T5=5*81\\T5=405[/tex]
The 5th term is 405
Answer:
a) Explicit Formula : aₙ = 3. (-3)ⁿ⁻¹
b) Fifth term : a₅ = 243
Step-by-step explanation:
i did the test
