Question

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

Answer 1

C

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