Question

Determine o 15 termo da P.A(4,10,...)?

Answer 1

an = a1 + (n - 1) . r
a15 = 4 + 14 . 6
a15 = 4 + 84
a15 = 88

Answer 2

a15=4+(15-1).6

a15=4+14.6

a15=4+84

a15=88