Объяснение:
Ответ: a₁=2.
Ответ:
x = -24
x = 10
240 =x * (x + x + 2*(15 -1)) /2
240 =
240 = x *(x +14)
240 = x^2 + 14x
240 - x^2 - 14x = 0
x^2 + 14x -240 = 0.
x^2 + 24x - 10x - 240 = 0
x*( x + 24) - 10*( x+24) = 0
(x +24) * (x - 10) = 0
Copyright © 2024 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
Объяснение:
Ответ: a₁=2.
Verified answer
Ответ:
x = -24
x = 10
Объяснение:
240 =x * (x + x + 2*(15 -1)) /2
240 =
240 = x *(x +14)
240 = x^2 + 14x
240 - x^2 - 14x = 0
x^2 + 14x -240 = 0.
x^2 + 24x - 10x - 240 = 0
x*( x + 24) - 10*( x+24) = 0
(x +24) * (x - 10) = 0
x = -24
x = 10