Question

sequences kind of confuse me, so could someone help?​

Answer 1

Answer:

C

Step-by-step explanation:

Consider the number of triangles in each diagram

1 → 1 → $2^{0}$

2 → 2 → $2^{1}$

3 → 4 → 2²

4 → 8 → 2³

The pattern of triangles is 1, 2, 4, 8, that is

$2^{0}$, $2^{1}$, 2², 2³

Note that the exponent is one less than the figures position in the pattern, thus

$a_{n}$ = $2^{n-1}$ → C