Question

the 4th term of the sequence is 25. the term-to-term rule is 'subtract 5'. what is the 2nd term of the sequence and how do we get it?

Answer 1

a₂ = 35

Explanation:

given the term- to term rule is ' subtract 5 '

this rule allows us to find the next term to the right from the preceding term

to obtain the second term a₂ requires us to go in the reverse direction from the fourth term a₄

this means doing the opposite, that is " add 5 "

a₄ = 25

a₃ = a₄ + 5 = 30

a₂ = a₃ + 5 = 35 ← second term