R3ÂU 82.. CR㜲 R႞⸷R ⸷R⸷ R R⸷ 甐⸷R RY R ㌠㐰⸷㔸 O⸷R ㌠㐰⸷㔸 ႞㜲 R....
6 . R
3
âu 82.. CR㜲 R႞⸷R ⸷R⸷ R R⸷ 甐⸷R Ry R ㌠㐰⸷㔸 o⸷R
㌠㐰⸷㔸 ႞㜲 R. o ⸷ 甐 R R႞⸷R ⸷R⸷ ႞A. S
q
= p RR B. S
q
= p R . S
q
= p R D. S
q
= p RR
âu 83.
႞⸷R ⸷R⸷ R⸷ 甐⸷R Ry R ㌠㐰⸷㔸 o⸷R ㌠㐰⸷㔸 ႞㜲 R. R 甐 R R o ⸷R⸷ ႞A. V R R
= 3 B. V R R
= p 3 . V 4 R R
= p 3 D. V = p R R
âu 84.
Ro o ⸷ q ႞ ‸႞ R႞⸷R ⸷R⸷ ႞ 㔸oR ⸷㔸 ⸷ R R⸷R R y ⸷ ằ⸷㔸A.
甐⸷RR 甐 R R႞ R o ⸷R⸷.p D. ႞
3
p B. ႞
3
p
p . ႞
3
A. ႞
3
4
8
âu 85.
႞⸷R ⸷R⸷ R⸷ 甐⸷R Ry 6 ㌠㐰⸷㔸 o⸷R 0 ㌠㐰⸷㔸 ႞㜲 8. R 甐 R R o ⸷R⸷ ằ⸷㔸႞A.
88pB.
0p.
96pD.
60pâu 86.
o ⸷ R⸷R ႞ ⸷ o o R႞⸷R ⸷R⸷. 甐⸷R R 甐 R R႞ R o ⸷R⸷.p . ႞ 6
3
p D. ႞ 6
3
p B. ႞ 3
3
A. ႞ 3
3
9
7
âu 87.CR㜲 R႞⸷R ⸷R⸷ R R⸷ 甐⸷R Ry ằ⸷㔸 4 ㌠㐰⸷㔸 o⸷R 5 ㌠㐰⸷㔸 ႞㜲 3. o ⸷ 甐 R R႞⸷R ⸷R⸷
ằ⸷㔸႞A. p B.
5p.
60pD.
0pâu 88. o ⸷ 甐 R ⸷㔸 q ႞⸷R R႞ R႞⸷R ⸷R⸷ R
o ㌠㐰⸷㔸 o⸷R=
8 R⸷ 甐⸷R Ry ‸ 6=
႞A.
96pB.
48p. 7p D. 4 7p
âu 89႞M
R ⸷㔸 q ႞ ⸷R R႞ R o ⸷R⸷ R o ⸷R⸷ R R႞㜲 Ro o ⸷ ႞A.
႞⸷R ‸႞⸷B.
႞ 㔸oR.
႞ 㔸oR ⸷㔸D.
႞⸷R Rữ ⸷Rậâu 90 :
‸㜲⸷㔸 R ⸷㔸 㔸o႞⸷ R㜲 ႞ 㔸oR ABC ⸷㔸 Ro A AB=႞ AC=႞ 3
. o ㌠㐰⸷㔸o⸷R R႞ R႞⸷R ⸷R⸷ ㌠o R㜲 ‸႞ Ro q ႞y ႞ 㔸oR ABC q ႞⸷R ‸႞ AB ằ⸷㔸႞A.
႞B.႞ . ႞ 3 D.
႞âu 91:. CR㜲 ႞ 㔸oR AOB
⸷㔸 Ro O RA 30 µ =
0
AB ႞=
. Q ႞y ႞ 㔸oR AOBq ႞⸷R ‸႞ AO ႞ ㌠o R႞⸷R ⸷R⸷ R o ⸷ 甐 R ⸷㔸 q ႞⸷R ằ⸷㔸႞p . p ႞ D. p ႞
A. p ႞ B. ႞
p
. KRo R ㌠㐰⸷㔸âu 92.
M R o ⸷R⸷ R o ⸷ 甐 R Ry ằ⸷㔸5p
R 甐 R5
3
3
o⸷R R႞ R o ⸷R⸷ ằ⸷㔸႞A. 5 B.
5. 5 D.
5âu 93႞ o ⸷ 甐 R ⸷㔸 q ႞⸷R R႞ R႞⸷R ⸷R⸷ R Ro
႞㜲 R = 6 R⸷ 甐⸷R Ry R = ႞A.
480pB.
9p .
40pD.
768pâu 94:
KR o ⸷R⸷ R R 甐 Rπ႞ 3
3