Question

Determine o 40 termo da P.A. (2,13,24,35...)

Answer 1

a1 = 2
R = 11
n = 40
a40 = ?

A40 = a1 + ( n- 1) R
A40 = 2 + 39 . 11
A40 =431

Answer 2

an= a1 + (n - 1) • r

• an= ?
• a1= 2
• n= 40
• r= 13 - 2 = 11

a40= 2 + (40 - 1) • 11

a40= 2 + 39 • 11

a40= 2 + 429

a40= 431