Question

FULL SOLUTION PLEASE​

Answer 1

Answer:

a₁₈ - a₁₃ = 25

Step-by-step explanation:

aₙ = a + (n - 1)d

=> a₁₈ = a + (18 - 1)d = a + 17d

=> a₁₃ = a + (13 - 1)d = a + 12d

d = 5

a₁₈ = a + 17d = a + 17 × 5 = a + 85

a₁₃ = a + 12d = a + 12 × 5 = a + 60

a₁₈ - a₁₃ = a + 85 - (a + 60)

a₁₈ - a₁₃ = a + 85 - a - 60

a₁₈ - a₁₃ = 25