Page 128 - Bangladesh_classwiz_BOOK2018_rev_Neat

Abykxjbx-11

2 1 −3
1| = [ ], = [ ] Ges = [ ] K¨vjKz‡jU‡i cÖ‡ek KivI| wb‡Pi gvb¸‡jv †ei Ki-
1 4 5

(K) (i)3 (ii)−2 (iii)10 + 2
1
(L) (i)| | (ii)| | (iii)| − | (iv)| | (v) |−3 |
2

(M) (i) + (ii) − (iii)4 −

4
2| [ ] †f±i Ges f‚wgi ga¨Kvi my²‡KvY †ei Ki|
3
‚
3| 8 GKK ˆ`N¨© Ges fwgi mv‡_ 20° †Kv‡Y Aew¯’Z GKwU †f±‡ii Avbf‚wgK I Dj¤^ Dcvsk †ei Ki|
5
4|(K) = [ ] Gi Rb¨ | | †ei Ki|
12

12
(L) †f±iwU‡K m¤cv`bv K‡i = [ ] evbv‡Z n‡e Ges | | †ei Ki|
5
5
(M) †f±iwU‡K cybivq m¤cv`bv K‡i wZbgvÎvi A_©vr = [12] evbvI Ges | | †ei Ki|
0
5
(N) wÎgvwÎK †f±iwU‡K m¤cv`bv K‡i = [ 0 ] evbvI Ges | | †ei Ki|
12

−3 1
5| aiv hvK, = [ ] Ges = [ ] GB gvb¸‡jv K¨vjKz‡jU‡i cÖ‡ek Kwi‡q wb‡Pi ivwk¸‡jvi gvb †ei
4 6
Ki-

(i) . (ii) × (iii) I Gi ga¨eZ©x †KvY KZ?

6| Kwig w¯’i cvwb‡Z N›Uvq 3 wK.wg./N›Uv †e‡M mvZvi Kv‡U| †mªv‡Zi †eM hw` N›Uvq 1 wK.wg./N›Uv nq Zvn‡j
u
(i) †mªv‡Zi weiæ‡× (ii) †mªv‡Zi mv‡_ 90° †Kv‡Y Kwi‡gi jwä †e‡Mi gvb †ei Ki|

5 −1
7| aiv hvK, = [ ] I = [ ] .
2 3

(K) × (L)MwVZ mvgšÍwi‡Ki †¶Îdj KZ?
1 2
8| = [−4] I = [ 7 ]
2 −1

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