Jawaban:
(1) U1 + U5 = 32
U5 = 10 + (5-1)3
U5 = 10 + 4 • 3
U5 = 22
jadi = U1 + U5 = 10+22=32 (benar)
(2) beda barisan= U2 - U1 = 13 - 10 = 3 (salah)
(3)Un = a+(n-1)b
U6 = 10+(6-1)3
U6 = 10+5•3
= 25(benar)
(4)Un = a+(n-1)b
U7 = 10+(7-1)3
U7 = 10+6•3
U7 = 28 (salah)
Penjelasan dengan langkah-langkah:
[tex]\tt \color{964b00}{J} \tt \color{c0c0c0}{A} \tt \color{0000ff}{D} \tt \color {000080}{I} \tt \color{00ffff} {K} \tt \color{ffd700}{A} \tt\color{00ff00}{N}\: \tt\color{ff0000}{J} \tt \color{6f00ff}{A} \tt \color{8f00ff}{W} \tt \color{800000}{A}\tt \color{964b00}{B} \tt \color{c0c0c0}{A} \tt \color{0000ff}{N}\: \tt \color {000080}{T} \tt \color{00ffff} {E} \tt \color{ffd700}{R} \tt \color{00ff00}{C} \tt \color{ff0000}{E} \tt \color{6f00ff}{R} \tt \color{8f00ff}{D} \tt \color{800000}{A}\tt\color{ff0000}{S} \tt \color{00ffff} {:} \tt \color{ffd700}{D}[/tex]
[answer.2.content]
