Скорость велосипедиста на 6 км/ч больше скорости пешехода. велосипедист за 1 час проезжает такое же расстояние, какое проходит пешеход за 3 часа. какова скорость пешехода?

Х- скорость пешехода
х+6 -скорость велосипедиста
1*(х+6)=3х
х+6=3х
х-3х=-6
-2х=-6
х=3 
3км/ч -скорость пешехода

1/5*6^1024-[(6^512+1)(6^256+1)(6^128+1)(6^64+1)(6^32+1)(6^16+1)(6^8+1)(6^4+1)(6²+1)(6+1)(6-1)]/(6-1)=1/5*6^1024-1/5[(6^512+1)(6^256+1)(6^128+1)(6^64+1)(6^32+1)(6^16+1)(6^8+1)(6^4+1)(6²+1)(6²-1)]=
=1/5*6^1024-1/5[(6^512+1)(6^256+1)(6^128+1)(6^64+1)(6^32+1)(6^16+1)(6^8+1)(6^4+1)(6^4-1)]=1/5*6^1024-1/5[(6^512+1)(6^256+1)(6^128+1)(6^64+1)(6^32+1)(6^16+1)(6^8+1)(6^8-1)]=1/5*6^1024-1/5[(6^512+1)(6^256+1)(6^128+1)(6^64+1)(6^32+1)(6^16+1)(6^16-1)=1/5*6^1024-1/5[(6^512+1)(6^256+1)(6^128+1)(6^64+1)(6^32+1)(6^32-1)]=1/5*6^1024-1/5[(6^512+1)(6^256+1)(6^128+1)(6^64+1)(6^64-1)]=1/5*6^1024-1/5[(6^512+1)(6^256+1)(6^128+1)(6^128-1)]=1/5*6^1024-1/5[(6^512+1)(6^256+1)(6^256-1)]=1/5*6^1024-1/5[(6^512+1)(6^512-1)]=1/5*6^1024-1/5(6^1024-1)=1/5*6^1024-1/5*6^1024+1/5=0,2

A₁ = 5, аn + 1= an + 3
a₂ = 5 + 3 = 8
d = 3
a₁₂ = 5 + 3(12-1) = 5 + 33 = 38
a₃₄ = 5 + 3(34-1) = 5 + 99 = 104

a₁ = 84, d = -5
a₃₇ = 84 - 5(37-1) = -96
a₆₀ = 84 - 5(60-1) = -211

-67; -60; -53...
а₁ = -67
d = 7
S₅₂ = 2a₁ + d(n-1)*n / 2 = 2*(-67) + 7(52-1)*52 / 2 = -134 + 18564 / 2 = 9215

an = 5n - 4
a₁ = 5*1 - 4 = 1
a₂ = 5*2 - 4 = 6
d = 5
S₁₅₀ = 2a₁ + d(n-1)*n / 2 = 2*1 + 5(150-1)*150 / 2 = 2 + 111750 / 2 = 55876

a₁ = 32, а₆₁ = -58
a₆₁ = 32 + d(61-1) = 32 + 60d
-58 = 32 + 60d
60d = -90
d = -1,5
-36 = 32 - 1,5(n-1)
-36 = 32 -1,5n + 1,5 
-36 = 33,5 - 1,5n
-69,5 = 1,5n 
n = -69,5/1,5 - не является

8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 88, 96, 104, 112, 120, 128, 136, 144, 152, 160, 168, 176, 184, 192, 200, 208, 216, 224, 232, 240, 248, 256, 264, 272, 280, 288, 296, 304, 312, 320, 328, 336, 344.
S = 7568