Trong không gian Oxyz, đường thẳng delta nằm trong mp alpha

51/51

d1:x=1-ty=tz=4t ,x-12=y+1-1=z,512,y=2x+1x+2, m=±3, z=x+yi, z-3z-1+2i, z1-i+z-1+i,,A=a2-b2

V=13Bh, y=fx, V=π53-2ln2, T=a+b, z1-z2, z2-z11+i, 32-434, cos2α=-45

S=∫abfxdx, S=π∫abf2xdx, S=1+log325, S=1+ln25, max0;1fx= 6, y=m cos x+1cos x+m

y=2sin2 x+3sin 2x-4cos2x, Cn+4n+1-Cn+3n=7n+3,y=11log13x2-4x+6+12, 1a,1b,1c

A-1;-1;1, y=x3-6x2+9x-2 , (P): 2x-2y+z+5=0, (P), 4z2-4z+3=0 , z1, z2, d1, d2,d3, S=9+99+999+...+99...99⏟n so 9

A1B1C1D1, d1:x+y-1=02x+z=0, 2x.9y=363x.4y=36

n⇀=2;-2;1, log2x+1<1, , ∫013x2+1dx, ∫01f''(x)1-xdx=1, y=-x3+3x,m<12

Giải thích

a∈(0;π2], cotα2, cos α2sin2α+sin α-3=0,2πa3;4πa2BSC^=30°, ASB^=60°, 60°, a427,a33,u⇀=ma⇀-3b⇀,α