Question

Write a recursive formula for this sequence.
4, 20, 100, 500, ...

Answer 1

`\\ \boxed{ \huge \boxed{\tt{} Answer}}`

`\longrightarrow` It is multiplied or skipped counting by 5

`\tt{4×5=20}`

`\tt{20×5=100}`

`\tt{100×5=500}`

`\\ \boxed{ \huge \boxed{\tt{} Multiplied\:by\:5}}`

`\\ \huge\boxed{\ddot\smile}`
`\longrightarrow`
`\\ \huge\boxed{\ddot\smile}`