Page 79 - Bangladesh_classwiz_BOOK2018_rev_Neat

mßg Aa¨vq

m~PKxq I jMvwi`gxq dvskb

(Logarithm and Indices)

m~P‡Ki mvnv‡h¨ A‡bK eo ev A‡bK †QvU msL¨v ev ivwk‡K Lye mn‡RB cÖKvk Kiv hvq| Avi GB m~PK †_‡KB
jMvwi`‡gi DrcwË| m~PK I jMvwi`‡gi mvnv‡h¨ wewfbœ iKg wnmve MYbv I MvwYwZK mgm¨vi mgvavb mnRZi
n‡q‡Q| m~P‡Ki gva¨‡g †hgb msL¨vi ˆeÁvwbK ev Av`k© iƒc cÖKvk Kiv nq †Zgwb jMvwi`‡gi gva¨‡g msL¨v ev
ivwki ¸b, fvM I m~PK m¤cwK©Z MYbvi KvR mn‡R n‡q‡Q| GB Aa¨v‡q ClassWiz K¨vjKz‡jUi e¨envi K‡i
wb‡¤œv³ welq¸‡jv m¤c‡K© Av‡jvPbv Kiv n‡e-

 m~PK I g~j Gi aviYv
 jMvwi`‡gi aviYv
 jMvwi`‡gi ˆewkó¨

 wewfbœ wfwËhy³ jMvwi`g Ges
 I ¯^vfvweK jMvwi`g ( )

GRb¨ w1 †P‡c e¨envi Ki‡Z n‡e|

7.1 m~PK Ges g~j

msL¨vi NvZ ‡hgb wØNvZ, wÎNv‡Zi gvb Ges Zv‡`i g~j ‡ei Kivi c×wZ c~‡e©B Av‡jvPbv Kiv n‡q‡Q| K¨vjKy‡jU‡i
wØNvZ evUb Pvc‡j GwU msL¨vwU‡K `yB evi ¸Y Kivi gva¨‡g ‡ei K‡i| aiv hvK, K¨vjKy‡jU‡i d evUb e¨envi
2
K‡i 34 ‡ei Ki‡Z n‡e| ZLb cÖK…Zc‡¶ 34 × 34 ‡ei K‡i K¨vjKy‡jUi djvdj ‡`q| Ab¨vb¨ m~PK ‡hgb
5
`kwgK ev fMœvsk A_ev D”PZi NvZ cÖ‡ek Kiv‡bvi Rb¨ ^ Kx e¨envi Ki‡Z nq| D”PZi NvZ 34 hZUv
2 1
¯úófv‡e ‡evSv hvq, 34 5 ev 34 0.43 ZZUv ¯úó fv‡e ‡evSv hvq bv | hLb ‡Kv‡bv msL¨v‡K Nv‡Z DbœxZ Kiv nq
2
ZLb cÖK…Zc‡¶ Gi eM©g~j ‡ei Kiv nq| hv wb‡Pi wP‡Î cÖ`wk©Z n‡q‡Q|

Nbg~‡ji Rb¨I GKB K_v cÖ‡hvR¨-

GB ‰ewk󨸇jv m~P‡Ki a‡g©i Dci wbf©i K‡i, ‡h‡nZy GKB wbavb ev wfwË (base) hLb ¸Y Ae¯’vq _v‡K ZLb
2
G‡`i m~PK¸‡jv ‡hvM nq| GB aviYv `kwgK ev fMœvsk NvZwewkó msL¨v eyS‡Z mvnvh¨ K‡i| 34 5, Gi Rb¨ m~P‡Ki
‰ewkó¨ e¨envi K‡i cvIqv hvq-
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