Page 96 - Bangladesh_classwiz_BOOK2018_rev_Neat

Gfv‡e h_vhZ msL¨Kevi = evUb Pvcvi gva¨‡g †h‡Kv†bv `~i‡Z¡i wmGbwR fvov †ei Kiv m¤¢e|

hw`I †QvU `~i‡Z¡i fvov †ei Kivi Rb¨ GB c×wZ MÖnY‡hvM¨ wKš‘ `xN© `~iZ¡ (aiv hvK, 50 wK‡jvwgUvi) fvov †ei
Kivi Rb¨ GB c×wZwU AmyweavRbK| myZivs, m~‡Îi mvnv‡h¨ GwU ‡ei Kiv mnR| mgvšÍi avivi Zg c`wU n‡jv

= + ( − 1) .

gv‡bi ZvwjKv e¨envi K‡i ‡h‡Kv‡bv c‡`i gvb †ei Kiv m¤¢e| wØZxq w¯Œ‡b †`Lv hv‡”Q †h 50 wK‡jvwgUvi åg‡Yi

Rb¨ fvov n‡jv 640 UvKv| jÿYxq†h, 50 wK‡jvwgUvi åg‡Yi fvov †ei Kivi Rb¨ 51 Zg c‡`i gvbwU †ei
Ki‡Z n‡e| KviY cÖ_g c`wU n‡jv 0 wK‡jvwgUvi åg‡Yi Rb¨|

myweavi gva¨‡g †h‡Kv†bv c‡`i gvb mivmwi †ei Kiv hvq| GRb¨ cÖ_‡g + ( − 1) c`wUi Abyiƒc
c` + ( − 1) AvKv‡i K¨vjKz‡jU‡i cÖ‡ek Kiv‡bv n‡jv| Gici r evUb †P‡c Gi gvb 40, Gi
gvb 51 I Gi gvb 12 cÖ‡ek Kiv‡bv n‡j djvdj 640 cvIqv hv‡e hv wb‡Pi w¯Œ‡b †`Lv‡bv n‡q‡Q| jÿYxq

†h, cÖwZwU gvb cÖ‡ek Kiv‡bvi ci = evUb Pvc‡Z n‡e|

Ab¨vb¨ `~i‡Z¡i åg‡Yi fvov †ei Kivi Rb¨ cybivq = †P‡c ïaygvÎ -Gi gvb cwieZ©b Ki‡jB n‡e|

8.5 ¸‡YvËi aviv

MwY‡Z ¸‡YvËi avivi wewfbœ iKg cÖ‡qvM i‡q‡Q| GB Kvi‡Y GwU AZ¨š ¸iæZ¡c~Y©| ‡Kv‡bv avivi †h‡Kv‡bv c` I
Í
Gi c~e©eZ©x c‡`i AbycvZ memgq mgvb n‡j A_©vr †h‡Kv‡bv c`‡K Gi c~e©eZ©x c` Øviv fvM K‡i fvMdj me©`v
mgvb cvIqv †M‡j †m avivwU‡K ¸‡YvËi aviv e‡j Ges fvMdj‡K mvaviY AbycvZ e‡j| mvaviYZ ¸‡YvËi avivi
cÖ_g c`‡K Ges mvaviY AbycvZ‡K Øviv wPwýZ Kiv nq| A_©vr cÖ‡Z¨KwU c` Zvi c~e©c‡`i mv‡_ Øviv ¸Y

Ki‡j cvIqv hvq|

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