3 years ago

Solve 15 = 2^(x+1).

1 answer:

8 0

2^x * 2 = 15
2^x= 15/2
2^x = 7,5
x = log 2 (7,5)

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NeTakaya

Answer:

$a_{n}$ = 6 $(5)^{n-1}$

Step-by-step explanation:

The n th term of a geometric sequence is

$a_{n}$ = a $(r)^{n-1}$

where a is the first term and r the common ratio

Here a = 6 and r = 30 ÷ 6 = 5, thus

$a_{n}$ = 6 $(5)^{n-1}$

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