An AP 5, 12, 19,

Here, first term = 5

Common difference = 12 - 5 = 7

Given that there are 50 terms in the AP.

To find: Last term, i.e. 50^th term = a₅₀

Since a_n = a + (n - 1)d

∴ a₅₀ = 5 + (50 - 1)7

= 5 + (49) × 7

= 5 + 343

= 348