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4. 125 X Iy If;
5. l25 lxlyJG"l
1. x(2x)'~~
2. 3x(2x)X
3. 9x (2x)X
4. lOxJ)'

l1tll 11.30- 13.30 'U.
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A B
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2. 18+10(J2+.J3)
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run 11.30 - 13.30 u.
0 " " 0 0
(fHH'UvH't'l sin A = 0.6 U"~ cos A = 0.8)
1. 8 tiVI
2. 16 tiVI
3. 18 ~VI..
4. 21 tiVI
5. 24 tiVI

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l~tl~ B c C Utl~ A nC =0
1. Ans = snc
2. (AnB)UC = 0
3. (AU B) n C = B
4. A-B = C-B
5. B UC cr. A'

12.
'tn'h 10
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rnn 11.30 - 13.30 u.
y
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2. {(x,y) I 1 ::; X ::; 3, X -I ::; y ::; I- X }
3. {(x, y) I 1 < X < 3, 1-X < y ::; X -I }
4. {(x,y) I 1 < X ::; 3, I- X ::; y < X -I }
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•tn~l 13
rnn 11.30 - 13.30 u.
..
15. ft1'11t~~t1u11J~hfl'~ 1oo vt~..l &ilu~~il
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5. 1,301
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B = { 4, 8, 12, 16, 20}
Utl~ C = {xi (x+1)(x-4) = 0}
2. B UC = B
3. A nB = {4, 8 }
4. B- A={12,16,20}
5. (An C) U B = {8, 12, 16, 20}

run 11.30 - 13.30 '"·
." " ct !'I I
19. t~unnmn'Utl~VIl'U'Utl~~u.JA'I11UJ).J3j).J'l'lln Au'U x, x +2 ua~ x +3 '11'U1tl
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n'tn 11.30 - 13.30 u.
0--------------------Q X
y
1. V = 2x2
(2-x)
2. V = 2x2
(3-x)
3. V = 2x2
(4-x)
4. V = 4x(2-x)2
5. V = 4x(3 - x)2

'11ih 18
n~n 11.30- 13.30 u.
21.
y
X
0 2 3
2x 2
- 4x+ 3 > 0
0 ...
1. 'tJfHll!1!'iJ".i.:i X
cS I 4
2. Y! = Y2 flfltln.Jt:l
4!1
X = 0 '11".Jt) X = 2
'
3. Y! <Y2
cS I 4!1
flflt:ll3.Jt:l 0 < X < 2
Q.l _J ( )2 I ; I -··
4. <tJV11flflt1'U,t:l~fl".iln y1 = 2 x - 1 + I t:~gfllfl1lfl".iln y2 = 3

A.l 0 X ( ) <!I I Gl !II 'I
22. 'lllflfl".ilTt lCUVIfllVI61J'16~el'tl3Jfll".i - ~ X 4- X fl6'tf1~ I'U'Itl&Vl
2
y
1. [0, 2] 2. [0, 2.5]
3. [0, 3] 4. [0,3.5]
s. [0, 4]
1. 5 2. 9
3. -7 4. -9
5. -58

l'lih 20
run 11.30-13.30 u.
I
!II cvc:t o "''II c:t '!fiCV
24. ~lnl'Hl~A"lfJ~mU1UA~).J&UU~1'YI 1, 2, 3, ... (mO'lJUt'l~t'IH) AuU~~.fll'Vt
2 3
4 5 6
7 8 9 10
11 12 13 14 15
1. 60,025
2. 62,525
3. 65,025
4. 66,225
5. 66,275

R = 5e-k + 5e-2k + ... + 5e-nkn
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't1ul 21
n~1 11.30 - 13.30 u.
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run 11.30- 13.30 u.
+
V lJIV '""'
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1. 6.92 tl~U'U'U
2. 12.50 fi~U'U'U
3. 77.50 tl~U'U'U
4. 82.50 fi~U'U'U
5. 141.00 tl~U'U'U

" ' " " "
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.,
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3
fl =0.1 5 ' p2 =0.25 Uil~ IP; =1
i=l
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Uil1fllA~iltiAileuflw~eu~-!!fl~UtttttJ~'UU'U'U tt1-!!ttl't'ittfleu~-!!ttm-,tlttfltttt3Jfll
1. 68.3 fl~UU'U
2. 70.7 fl~UU'U
3. 72.0 fl~U'I-.!'1-.!
4. 73.7 fl~UU'I-.!
5. 74.5 fl~UU'U

ntn 11.30 - 13.30 u.
1. 15
2. 18
3. 19
4. 20
5. 24

run 11.30 - 13.30 u.
29.
ll1,;1.:J (x-3s,x+3s) n-hfl'u (1400, 1580)
1. X 1445 Utl~ s2
= 2025
2. X 1445 Utl~ s2
= 45
3. X 1490 Utl~ s2
= 45
4. X = 1490 Utl~ s2
= 2025
5. X 900

,;;, 26
rnn 11.30 - 13.30 u.
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0 "
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run 11.30- 13.30 u.
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run 11.30- 13.30 l.!•
.,
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60 65 65 67 70 71 73 75 76 76
79 81 83 84 85 85 88 89 90 92
95 96 99 100 100
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O-Net คณิตศาสตร์ 2560

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O-Net คณิตศาสตร์ 2560

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