Ответ:
49, 67, 88, ...
Пошаговое объяснение:
aₙ = 4 + 3n(n-1)/2
a₁ = 4 + 0 = 4
a₂ = 4 + 3*2*1/2 = 7
...
a₆ = 4 + 3*6*5/2 = 4 + 45 = 49
a₇ = 4 + 3*7*6/2 = 4 + 63 = 67
a₈ = 4 + 3*8*7/2 = 88
4+3=7
7+(3+3)=7+6=13
13+(3+3+3)=13+9=22
22+(3+3+3+3)=22+12=34
34+(3+3+3+3+3)=34+15=49
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Answers & Comments
Ответ:
49, 67, 88, ...
Пошаговое объяснение:
aₙ = 4 + 3n(n-1)/2
a₁ = 4 + 0 = 4
a₂ = 4 + 3*2*1/2 = 7
...
a₆ = 4 + 3*6*5/2 = 4 + 45 = 49
a₇ = 4 + 3*7*6/2 = 4 + 63 = 67
a₈ = 4 + 3*8*7/2 = 88
...
Verified answer
4+3=7
7+(3+3)=7+6=13
13+(3+3+3)=13+9=22
22+(3+3+3+3)=22+12=34
34+(3+3+3+3+3)=34+15=49