A geometric sequence has an initial value of 1/2 and a common ratio of 8. Write an exponential function to represent this sequen
ce.
A: f(X) = 8· (1/2)^x
B: f(X) = 8· (1/2)^-1
C: f(x) = 1/2 ·8^x
D: f(x) = 1/2 ·8^x-1
please help me
2 answers:
Answer:
The correct option is D.
Step-by-step explanation:
It is given that the initial value of a GP is 1/2 and common ratio is 8. It means


The nth term of a GP is

where,
is inital value and r is common ratio.
Substitute
and
in the above formula.

The exponential function to represent this sequence is

Therefore the correct option is D.
Answer:
D
Step-by-step explanation:
the n th term of a geometric sequence is
= a
Where a is the first term and r the common ratio
here a =
and r = 8, hence
f(x) = 
→ D
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