tolong dibantu jawab nomor 4 teman tolong banget ya:(

InDuksi MateMatKa

•
n = 1
2(1) - 1 = (1)²
1 = 1
Benar

••
n = k
1 + 3 + 5 + 7 + 9 +  ... + (2k - 1) = k²  
Benar

•••
n = k + 1
[1 + 3 + 5 + 7 + 9 +  ... + (2k - 1)] + 2(k + 1) - 1 = (k + 1)²

[k²] + 2(k + 1) - 1 = k² + 2k + 1
k² + 2k + 2 - 1 = k² + 2k + 1
k² + 2k + 1 = k² + 2k + 1
Benar