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2 0 . Ó ÿêîñò³ åëåìåíòà ïðîñòîðó Ñ ìîæíà âçÿòè âåêòîð<br />
X r =(õ 1 , õ 2 , õ 3 ) ðîçì³ðíîñò³ 3, êîìïîíåíòè ÿêîãî âèçíà÷àþòüñÿ<br />
òàêèì ÷èíîì:<br />
õ 1 — ê³ëüê³ñòü ïðîäàíèõ ãàçåò, âàðò³ñòü îäíîãî åêçåìïëÿðà<br />
ÿêèõ íå ïåðåâèùóº 1 ãðèâíþ;<br />
õ 2 — ê³ëüê³ñòü ïðîäàíèõ ãàçåò, âàðò³ñòü îäíîãî åêçåìïëÿðà<br />
ÿêèõ íå ïåðåâèùóº 1.5 ãðèâí³, àëå ïåðåâèùóº 1 ãðèâíþ;<br />
õ 3 — ê³ëüê³ñòü ïðîäàíèõ ãàçåò, âàðò³ñòü îäíîãî åêçåìïëÿðà<br />
ÿêèõ ïåðåâèùóº 1.5 ãðèâí³.<br />
×èòà÷åâ³ ïðîïîíóºìî íàâåñòè ³íø³ âàð³àíòè.<br />
ÂÏÐÀÂÈ<br />
2.1. ʳîñê äâà äí³ ïðîäຠíàá³ð ãàçåò, ùî ñêëàäàºòüñÿ ³ç<br />
îäíàêîâî¿ ê³ëüêîñò³ íàéìåíóâàíü. Òðåáà çíàéòè ê³ëüê³ñòü<br />
ïðîäàíèõ çà äâà äí³ ãàçåò êîæíîãî íàéìåíóâàííÿ, ÿêùî çà<br />
êîæíèé äåíü ö³ äàí³ â³äîì³, ³ ðåçóëüòàò çàïèñàòè ó âèãëÿä³<br />
âåêòîðà.<br />
2.2. ʳîñê äâà äí³ ïðîäຠíàá³ð ãàçåò, ïðè÷îìó ê³ëüê³ñòü<br />
íàéìåíóâàíü íå îäíàêîâà.<br />
Òðåáà çíàéòè ê³ëüê³ñòü ïðîäàíèõ çà äâà äí³ ãàçåò êîæíîãî<br />
íàéìåíóâàííÿ, ÿêùî çà êîæíèé äåíü ö³ äàí³ â³äîì³, ³<br />
ç’ÿñóâàòè ïèòàííÿ ïðî ìîæëèâ³ñòü ðîçâ’ÿçàííÿ ö³º¿ çàäà÷³<br />
ó âèãëÿä³ âåêòîðà.<br />
2.3. ʳîñê, ÿêèé ïðàöþº ç 9-¿ ãîäèíè ðàíêó äî 9-¿ ãîäèíè<br />
âå÷îðà, ïðîäຠñèãàðåòè 25 âèä³â. ³äîìî, ùî ç 9-¿ ãîäèíè äî<br />
13-¿ ãîäèíè âåêòîð ïðîäàíèõ ñèãàðåò òàêèé:<br />
X r =(x 1 ,x 2 ,x 3 , ..., x 25 ). Ç 13-¿ ãîäèíè äî 17-¿ ãîäèíè ïðîäàíî<br />
ñèãàðåò âäâ³÷³ ìåíøå, í³æ çà ïåðøèé ïåð³îä (9 00 –13 00 ), à ç<br />
17-¿ ãîäèíè äî 21-¿ ãîäèíè ïðîäàíî ñèãàðåò âäâ³÷³ á³ëüøå ó<br />
ïîð³âíÿíí³ ç òèì ñàìèì ïåðøèì ïåð³îäîì. ³äîìî òàêîæ,<br />
ùî ö³íè íà ñèãàðåòè òàê³: âàðò³ñòü ïåðøî¿ äåñÿòêè àñîðòèìåíòó<br />
1.5 ãðí., âàðò³ñòü äðóãî¿ äåñÿòêè àñîðòèìåíòó 2 ãðí.,<br />
à ³íø³ ñèãàðåòè àñîðòèìåíòó êîøòóþòü 3 ãðí. Òðåáà çíàéòè<br />
äåííó âèðó÷êó â³ä ïðîäàæó ñèãàðåò. Ïðèéìàþ÷è äî óâàãè<br />
ïðèêëàä 2.1.4, ðîçâ’ÿæ³òü öþ âïðàâó äâîìà ñïîñîáàìè.<br />
2.4. Âçóòòºâà ôàáðèêà “Çîëóøêà” â ëþòîìó 2003 ðîêó<br />
âèðîáèëà Q r Ï =(× Ï , Æ Ï , Ä Ï ) ïàð âçóòòÿ, äå × Ï — ê³ëüê³ñòü<br />
ïàð ÷îëîâ³÷îãî âçóòòÿ, Æ Ï — ê³ëüê³ñòü ïàð æ³íî÷îãî âçóòòÿ,<br />
Ä ï — ê³ëüê³ñòü ïàð äèòÿ÷îãî âçóòòÿ. ³äîìî, ùî â ñ³÷í³<br />
2003 ðîêó ôàáðèêà âèðîáèëà â 1.2 ðàç ìåíøå ïàð âçóòòÿ ó<br />
ïîð³âíÿíí³ ç ëþòèì, à â áåðåçí³ ó 1.5 ðàç á³ëüøå òàêîæ â<br />
ïîð³âíÿíí³ ç ëþòèì. Òðåáà çíàéòè âåêòîð òîâàð³â çà ïåðøèé<br />
êâàðòàë 2003 ðîêó.<br />
2.5. Ïðè íîðìàëüí³é ³íòåíñèâíîñò³ ðîáîòè ôàáðèêà “×îðíîìîðî÷êà”<br />
(ì. Îäåñà) âèðîáëÿº òàêèé âåêòîð (àñîðòèìåíò)<br />
ìîðîæåíîãî X r =(x 1 , x 2 , ..., x 50 ). Ïðè öüîìó óïîðÿäêîâàí³ñòü<br />
àñîðòèìåíòó óçãîäæóºòüñÿ çã³äíî ç àëôàâ³òîì ðîñ³éñüêî¿<br />
ìîâè. Íàïðèêëàä, x 1 º ê³ëüê³ñòü áðèêåò³â ìîðîæåíîãî “Àññîëü”.<br />
Ó áåðåçí³ ì³ñÿö³ ³íòåíñèâí³ñòü ðîáîòè λ 1 äîð³âíþº 0.7,<br />
à â ëèïí³ — 2. Òðåáà çíàéòè ó ñê³ëüêè ðàç³â çá³ëüøèâñÿ<br />
âåêòîð ìîðîæåíîãî ó ëèïí³ ì³ñÿö³ ó ïîð³âíÿíí³ ç âåêòîðîì<br />
ìîðîæåíîãî ó áåðåçí³ ì³ñÿö³.<br />
2.6. Âêàæ³òü óïîðÿäêîâàíó ïàðó ÷èñåë (õ, ó), ïðè ÿê³é<br />
ë³í³éíà êîìá³íàö³ÿ<br />
⎛3⎞ ⎛7<br />
⎞<br />
x⎜ ⎟+<br />
y⎜ ⎟ çàäîâîëüíÿº òàê³ âèìîãè:<br />
⎝5⎠ ⎝11⎠ 1) äîð³âíþº âåêòîðó (17, 27); 2) ìຠäîäàòí³ êîîðäèíàòè.<br />
2.7. Äîâåñòè ë³í³éíó çàëåæí³ñòü âåêòîð³â:<br />
r<br />
r<br />
1) a<br />
1<br />
= (2, −1,2)<br />
³ a<br />
2<br />
= (6, −3,6)<br />
;<br />
r r<br />
r<br />
2) a<br />
1<br />
= (5,2) , a<br />
2<br />
= (30,12) , a<br />
3<br />
= ( −15, −6)<br />
;<br />
r<br />
r<br />
r<br />
3) a<br />
1<br />
= (2,6,2,6) , a<br />
2<br />
= (4,2,2,4) , a<br />
3<br />
= (6, −2,2,2)<br />
.<br />
2.8. Äîâåñòè ë³í³éíó íåçàëåæí³ñòü âåêòîð³â:<br />
r<br />
r<br />
1) a<br />
1<br />
= (1,3) ³ a<br />
2<br />
= (2,5) ;<br />
r<br />
r<br />
2) a<br />
1<br />
= (1, −3, 5) ³ a<br />
2<br />
= (2, −6,7)<br />
;<br />
r<br />
r<br />
3) a<br />
1<br />
= (5,11) ³ a<br />
2<br />
= (10, 0) .<br />
r r r<br />
r<br />
2.9. Ó áàçèñ³ e1, e2,<br />
e çàäàíî âåêòîðè a<br />
3<br />
1<br />
= (5,5,0) ,<br />
r<br />
r<br />
a<br />
2<br />
= (5, −5,5)<br />
i a<br />
3<br />
= ( −15,25, −30)<br />
.<br />
r r r<br />
Ïîêàæ³òü, ùî âåêòîðè a1, a2,<br />
a óòâîðþþòü áàçèñ.<br />
3<br />
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