Ivy and Andrey were asked to find an explicit formula for the sequence [Math Processing Error]. Ivy said the formula is an=19−19n. Andrey said the formula is an=−19+19n. Who is correct?(1 point)

Responses

neither Ivy nor Andrey
neither Ivy nor Andrey

both Ivy and Andrey
both Ivy and Andrey

only Ivy
only Ivy

only Andrey