Suku ke 50 barisan bilangan 3, 7, 11, 15, ..... adalah? #sertai penjelasan rinci

a = 3.
b = 7 - 3 = 11 - 7 = 4.
n = 50.

Un = a + (n - 1)b.
U50 = 3 + (50 - 1)4.
U50 = 3 + (49)4.
U50 = 3 + 196.
U50 = 199.

U1 = 3
U2 = 7
U3 = 11
Beda = 4

Un = U1 + (n-1)b
U50 = 3 + (50 - 1)4
U50 = 3 + 49.4
U50 = 3 + 196
U50 = 199

semoga membantu ^_^