Page 122 - Bangladesh_classwiz_BOOK2018_rev_Neat

GKv`k Aa¨vq

†f±i

(Vector)

†¯‹jvi Ggb GKwU ivwk hvi ïay gvb Av‡Q †hgb fi, ZvcgvÎv BZ¨vw`| Aciw`‡K †f±i n‡jv MvwYwZK ivwk hvi
gvb I w`K DfqB Av‡Q| wbw`©ó ˆ`‡N©¨i GKwU †iLv hv ‡Kv‡bv wbw`©ó w`KgyLx †hgb GKwU Zxi wPý n‡jv †f±‡ii
me †_‡K mij D`vniY| MwYZ, weÁvb I cÖ‡KŠkj we`¨vq †f±i e¨vcKfv‡e e¨eüZ nq| GB Aa¨v‡q ClassWiz
K¨vjKz‡jUi e¨envi K‡i wb‡¤œv³ welq¸‡jv m¤c‡K© Av‡jvPbv Kiv n‡e-

 ‡f±‡ii Dc¯’vcb
 ‡f±‡ii gvb I w`K wbY©q
 ‡f±i exRMwYZ

 ‡f±i WU ¸Yd‡ji gvb wbY©q I
 ‡f±i µm¸Yd‡ji gvb wbY©q

w5 †P‡c †f±i mode wbe©vPb K‡i †f±‡ii mKj wn‡me Kiv nq|

11.1 ‡f±‡ii Dc¯’vcb

⃗
̂
†f±i‡K wewfbœfv‡e Dc¯’vcb Kiv hvq| GKwU †f±i ‡K mvaviYZ ̂ + ̂ + AvKv‡i Dc¯’vcb Kiv nq|
D³ †f±iwU‡K Avevi 3 × 1 g¨vwUª· AvKv‡i wb‡¤œvv³fv‡e Dc¯’vcb Kiv hvq|

⃗
= [ ]

CASIO ClassWiz K¨vjKz‡jU‡i †f±i‡K GKwU GKK Kjvg wewkó g¨vwUª· AvKv‡i we‡ePbv Kiv n‡q‡Q| GB
g¨vwUª·wU‡K ejv nq Ômvwi †f±iÕ K¨vjKz‡jU‡i †f±i‡K msL¨vMZ Dcv`vb¸‡jv Øviv Dc¯’vcb Kiv n‡q‡Q| GKwU
†f±i wba©viY Kivi Rb¨ w5 ‡P‡c †f±i mode wbe©vPb Kivi ci Vct A wba©viY Ki‡Z 1 Pvc‡Z n‡e

| Zvici †f±iwUi gvÎv wbw`©ó Ki‡Z n‡e| 3 gvÎv wewkó †f±i wba©viY Kivi Rb¨ 3 Pvc‡Z n‡e|

̂
= 3 ̂ + 2 ̂ − 6 ‡f±iwU K¨vjKz‡jU‡i cÖ‡ek Kiv‡bvi Rb¨ †f±iwUi Dcv`vb¸‡jv hv G‡ÿ‡Î 3, 2 I −6
cÖ‡ek Kiv‡Z n‡e| cÖ‡Z¨KwU Dcv`vb cÖ‡ek Kiv‡bvi ci = evUb Pvc‡Z n‡e| w¯Œ‡b †f±i ‡K
3
= [ 2 ] AvKv‡i †`Lv‡e|
−6

117