10.º ANO - 2020/2021

qa 1
]-inf,1] e [-5/3,1]
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qa 2
3x7^(2/3)
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qa 3
y=-1/7 x -2/7
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1.º TESTE
1. D	2. B	3. B	4. 3rc(5)	5. 9rq(5)-18	6. 16pi*rq(5)	8. A
9. x=4; y=-5x/4; y=3x-7; (x-2)^2+(y+5/2)^2=41/4; B; (x+2)^2+(y+3)^2<25 e -3<=y<x e x>=-2	10. 3+rq(6)+rq(15)
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qa 4
rq(97)
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qa 5
k=0 ou k=5/3
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2.º TESTE
1. B	2. C	3. C; L; 2rq(3)		4. C; não	5. (x,y)=(-2,4)+k(4,-1); y=x/3; 3+3rq(2)
6. pertence; (5/2,5/2); D; 3/2		7. (-6/5,8/5)
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qa 6
neg. em ]-inf,-5/2[U]1,+inf[ e pos. em ]-5/2,1[
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3.º TESTE
1. B; (1,13,0);	(x-6)^2+(y-2)^2+(z-5)^2=3	2. 44,40; 150 e 27,5	3. D; ]-7,3] e [-3,4]	4. C	5. -3/2 e 0
6. x=-11/5 v x=3; ]-inf,-3/2]	7. C; ]-inf,-5]U]1,+inf[; 10,39 e -10,39 e -3,73 e -0,27	8. D; y=-3x+37/4
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qa 8
3x-1/2 e 9x-3/2
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qa 9
x=-3 v x=-1/5 v x=2
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qa 10
26; -rq(10) e rq(10); (3x+1)^2
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4.º TESTE
1. C; x^2+(y-1)^2<=9 e y<=3/2 x+13/4 e x>=0	2. B	3. [6,8[	4. A; x=+-rq(6); D	5. A
6. 26; [1,2]U[3,+inf[; 1,34 e 4,49	7. 4,79; 16h30'		8. 23/2 e 10 e -2
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