Page 5 - DIGITAL BOOK MUHAMMAD AZWARDI NASUTION

U = a

1
U − U = b  U = U + b = a + b

2
2
1
1
U − U = b  U = U + b = a + 2 b
3
2
3
2
U − U = b  U = U + b = a + b 3
4
3
3
4
Dapat dituliskan

U = a
1

U = a + b
2
U = a + 2 b

3
U = a + b 3

4
.

.

Rumus suku ke − n barisan aritmetika

U = a + (n − 1 )b
n