d 1 : x = 1 - t y = t z = 4 t , x - 1 2 = y + 1 - 1 = z , 5 12 , y = 2 x + 1 x + 2 , m = ± 3 , z = x + y i , z - 3 z - 1 + 2 i , z 1 - i + z - 1 + i ,, A = a 2 - b 2
V = 1 3 B h , y = f x , V = π 5 3 - 2 ln 2 , T = a + b , z 1 - z 2 , z 2 - z 1 1 + i , 3 2 - 4 3 4 , cos 2 α = - 4 5
S = ∫ a b f x d x , S = π ∫ a b f 2 x d x , S = 1 + log 3 2 5 , S = 1 + ln 2 5 , max 0 ; 1 f x = 6 , y = m cos x + 1 cos x + m
y = 2 sin 2 x + 3 sin 2 x - 4 cos 2 x , C n + 4 n + 1 - C n + 3 n = 7 n + 3 , y = 1 1 log 1 3 x 2 - 4 x + 6 + 1 2 , 1 a , 1 b , 1 c
A - 1 ; - 1 ; 1 , y = x 3 - 6 x 2 + 9 x - 2 , ( P ) : 2 x - 2 y + z + 5 = 0 , ( P ) , 4 z 2 - 4 z + 3 = 0 , z 1 , z 2 , d 1 , d 2 , d 3 , S = 9 + 99 + 999 + . . . + 99 . . . 99 ⏟ n so 9
A 1 B 1 C 1 D 1 , d 1 : x + y - 1 = 0 2 x + z = 0 , 2 x . 9 y = 36 3 x . 4 y = 36
n ⇀ = 2 ; - 2 ; 1 , log 2 x + 1 < 1 , , ∫ 0 1 3 x 2 + 1 d x , ∫ 0 1 f ' ' ( x ) 1 - x d x = 1 , y = - x 3 + 3 x , m < 1 2
a ∈ ( 0 ; π 2 ] , c o t α 2 , c o s α 2 sin 2 α + sin α - 3 = 0 , 2 πa 3 ; 4 πa 2 B S C ^ = 30 ° , A S B ^ = 60 ° , 60 ° , a 42 7 , a 3 3 , u ⇀ = m a ⇀ - 3 b ⇀ , α