Answer:
17 term
Explanation:
the nth term of an arithmetic progression is
= a₁ + d(n - 1)
a₁ is the first term, d the common difference, n the term number
here a₁ = 18 and d = a₂ - a₁ = 23 - 18 = 5
substitute these values into the nth term formula
= 18 + 5(n - 1) = 18 + 5n - 5 = 5n + 13
equate 5n + 13 to 98 and solve for n
5n + 13 = 98 ( subtract 13 from both sides )
5n = 85 ( divide both sides by 5 )
n = 17
98 is the 17th term