Question

If a_n denotes the nth term of the AP 3, 8, 13, 18, ... then what is the value of (a₃₀ – a₂₀)?

Options

• 40

• 36

• 50

• 56

Answer 1

50

Explanation:

Here a = 3 and d = 5.

∴ (а₃₀ – a₂₀) = (3 + 29 × 5) – (3 + 19 × 5)

= 148 – 98

= 50