Question

Encontre os 55 primeiros termo da PA (-4,-2,0...)?

Answer 1

55 termos da PA (-4,-2,0...):

r = a2 - a1
r = - 2 - (-4)
r = - 2 + 4
r = 2

a55 = a1 + 54.r
a55 = - 4 + 54.2
a55 = - 4 + 108
a55 = 104

Resp.: { - 4; - 2; 0; 2 ; 4; 6 ; 8; 10; 12, 14, 16, 18, 20, 22,24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52; 54; 56; 58; 60; 62; 64; 66; 68; 70; 72; 74; 76; 78; 80; 82; 84; 86; 88; 90; 92; 94; 96; 98; 100; 102; 104)