B₅ = b₁ * q⁴ = 2 * 3⁴ = 2 * 81 = 162
Ответ:
1. =-18с^4/7d9c^2d=-2c^2/7d^2
2. =4y^2/9x^4
3. =3x/a
4. =27a^3×a^2×7b^2/b×18a^4=21b/2a
решение:
4*1/2*a*h = 2*a*h (или) 2ah
<span>1)Sin 3x - Cos 3x = 2
По формуле: </span>Sin x - Cos x =
(sin(x - π/4)) = 0
(sin(3x - π/4)) = 2
sin(3x - π/4) =
3x - π/4 = (-1)^n × arcsin
+ πn (n ∈ Z)
3x = (-1)^n × arcsin
+ π/4 + πn (n ∈ Z)
x =
× (-1)^n × arcsin
+ π/12 + πn/3 (n ∈ Z)
Ответ: x =
× (-1)^n × arcsin
+ π/12 + πn/3 (n ∈ Z)
3=√9
4=√16
<u>N=√14
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