Question

) Insert three arithmetic means between 2 and 14.​

Answer 1

$\bf{→ a_1 = 2}$

$\bf{→ a_5 = 14}$

$\bf{→ n = 5}$

$\bf{→ d = ?}$

$\bf{→ a_n = a + (n−1) d}$

$\bf{→ a_5 = a+(5−1)d}$

$\bf{→ 14 = 2 + 4d}$

$\bf{→ 12 = 4d}$

$\bf{→ d = 3}$

$\bf \red{∴2,5,8,11,14,.....}$