2x^2+4x+1=0 5x^2+x+2=0 4x^2+4x+1=0 x^2+5x-6=0

Question

Алгебра: 2x^2+4x+1=0 5x^2+x+2=0 4x^2+4x+1=0 x^2+5x-6=0

Саня1585 · Accepted Answer

Решение 1)  2cosx-1 0 cosx 1/2 arccos(1/2) + 2πn x 2π - arccos(1/2) + 2πn, n ∈ Z π/3 + 2πn x 2π - π/3 + 2πn, n ∈ Z π/3 + 2πn x  5π/3 + 2πn, n ∈ Z 2)  sin2x - √2/2   0  sin2x   √2/2  - π - arcsin(√2/2) + 2πk 2x arcsin(√2/2) + 2πk, k ∈ Z - π - π/4 + 2πk 2x π/4 + 2πk, k ∈ Z  - 5π/4 + 2πk 2x π/4 + 2πk, k ∈ Z  - 5π/8 + πk x π/8 + πk, k ∈ Z 3)  tgx 1 - π/2 + πn x arctg(1) + πn, n ∈ Z - π/2 + πn x π/4 + πn, n ∈ Z...

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