Page 80 - Bangladesh_classwiz_BOOK2018_rev_Neat

2 1 1 1 1 1 2
+
⁄
⁄
34 5 = 34 5 5 = 34 5 × 34 5 = (34 5 )
2 ⁄ 2× 1 1
2
, 34 5 = 34 5 = (34 )5
AZGe ejv hvq, GwU 34 Gi cvuP-Zg g~‡ji wØNvZ| Ab¨fv‡e, GwU 34 Gi wØNv‡Zi cvuP-Zg g~j|

K¨vjKy‡jUi Dfqfv‡eB GKB djvdj cÖ`k©b K‡i| G‡¶‡Î m~PK evUb ^Ges g~jF (q^) evUb e¨envi
2 2 1
Ki‡Z nq| j¶¨ Ki‡j †`Lv hv‡e,34 5 msL¨vwU √34 Gi †P‡q †QvU, KviY , Gi †P‡q †QvU|
5 2
34 Gi Rb¨ GB ‰ewk󨸇jv ch©v‡jvPbv Kiv n‡jI, ‡h ‡Kv‡bv abvZ¥K msL¨vi Rb¨ GwU cÖ‡hvR¨| ‡Kv‡bv msL¨v‡K
†h‡Kv‡bv Nv‡Z DbœxZ Kivi Rb¨ GKwU ¸iæZ¡c~Y© m¤úK© n‡jv,

1

= ( ) = ( √ )

1

A_ev, = ( ) = √
‡hLv‡b ‡h‡Kv‡bv c~Y msL¨v I Ak~b¨ c~Y© msL¨v Ges > 0 ‡h‡Kv‡bv wfwË|
©

hw`I Dc‡ii c×wZ¸‡jv e¨envi K‡i †h‡Kv‡bv NvZ wewkó msL¨vi gvb ‡ei Kiv hvq, wKš‘ ^ evUb e¨envi K‡i
mivmwi gvb ‡ei Kiv Av‡iv myweavRbK| wb‡Pi wZbwU w¯Œ‡b wZbfv‡e 34 0.43 Gi gvb ‡ei Kivi c×wZ ‡`Lv‡bv
n‡jv-

2
1
Dc‡ii w¯Œb¸‡jv‡Z j¶Yxq ‡h, ‡h‡nZy NvZmg~n < 43 < µg AbymiY K‡i AZGe msL¨v¸‡jvi gv‡SI µg
5 100 2
2 43 1
_vK‡e A_©vr, 34 5 < 34 100 < 34 2|

7.2 jMvwi`g

jMvwi`‡gi aviYv, m~P‡Ki aviYvi mv‡_ ‡Rvov‡jvfv‡e m¤úwK©Z| Zviv wKfv‡e m¤úwK©Z Zv ‡evSvi Rb¨ 10 wfwË
m¤úbœ GKwU dvskb ‡bIqv n‡jv-

( ) = 10
hw` m~P‡Ki gvb Rvbv _v‡K, ‡hgb = 2.4 Zvn‡j^ evU‡bi gva¨‡g mn‡RB Gi gvb ‡ei Kiv hvq| cÖK…Zc‡¶,
`kwfwËK m~PK dvsk‡bi Rb¨ GKwU we‡kl wb‡`©kbv G hv qi ‡P‡c cvIqv hvq| wb‡Pi w¯Œ‡b `yBwU
c×wZ‡Z ‡`Lv‡bv n‡jv-

75