B1 = 5 bn+1 = - 15/bn
b (1+1) = - 15/b1
b2 = - 15/5= - 3
b(2+1) = - 15/b2
b3 = - 15/b2 = - 15/ (- 3) = 5
b(3+1) = - 15/b3
b4 = - 15/b3 = - 15/5 = - 3
b5 = b(4+1) = - 15/b4 = - 15/ (- 3) = 5
b(5+1) = - 15/b5
b6 = - 15/b5 = - 15/5 = -3
X+√ x² + 26х+169, при х ≤ -13x+√ x² + 26х+169=x+√(x+13)²=x+x+13=2x+13
Ответ:
Объяснение:
cosx=-√2/2
x₁=(3π/4)+2πn x₂=(5π/4)+2πn,.