Determite 40th term of arithmetic sequence 4, 12, 20, 28

Jawaban:

316

Penjelasan dengan langkah-langkah:

a = U1 = 4

b = U2-U1 = 12-4 = 8

Un = a+(n-1)b

U40 = 4+(40-1)8

= 4+39×8

= 4+312

= 316

Sorry if wrong