+FML Posted June 9, 2015 Report Posted June 9, 2015 (edited) Asta a fost penultima lectie de anul asta.Pf = Pi (1+p/100)(1+q/100) - 2x scumpire [bineinteles,daca pun ''-'' voi avea de calculat de 2x o ieftinire].Boon,toate bune si frumaose dar daca ma apuc sa calculez nu mere mai nimic.Ex:Pf = 970 RONEl,inainte sa fi ajuns asa,a avut parte de o scumpire cu 30% si mai apoi cu 25%.Pi = ?970 = Pi(1+30/100) + (1+25/100).In paranteza as aduce la numitor comun.970 = 130Pi + 125 Pi = 155PiPi = 970/155E bine asa? Edited June 9, 2015 by Terror
+GodsOtherHand Posted June 9, 2015 Report Posted June 9, 2015 Nu prea inteleg ce ai facut acolo Dar tine cont ca a 2-a scumpire e din noul pret, nu din pretul initial. Deci 130 pi + 125 pi nu e ok.. al 2-lea pi e mai mare decat primul pi , ca deja a fost facuta o scumpire.pretul final e de 970? deci dupa prima scumpire ar fi fost X + X* 1/4 = 970. (1/4 e 25%).Aflii acel X. Apoi Y+Y* (30/100) = X. Aflii Y. asta e pretul initial. Sau am inteles eu gresit? love is a verb Love is a doing word
+FML Posted June 9, 2015 Author Report Posted June 9, 2015 (edited) Asa m-am gandit si eu inainte sa ne predea,dar dupa,ne-a trantit formula de mai sus cu completarea ca e singurul fel cand se rezolva corect. Edited June 9, 2015 by Terror
+GodsOtherHand Posted June 9, 2015 Report Posted June 9, 2015 pai formula lu profa e extrem de diferita de formula ta tu ai Pi(1+30/100) + (1+25/100). profa are Pf = Pi (1+p/100)(1+q/100) ea are inmultire. Tu ai adunare.. observi diferenta? Formula ei e corecta (si in concordanta cu ce am povestit eu mai sus), a ta nu e corecta love is a verb Love is a doing word
+GodsOtherHand Posted June 9, 2015 Report Posted June 9, 2015 App, ai scris asta:970 = Pi(1+30/100) + (1+25/100).In paranteza as aduce la numitor comun.970 = 130Pi + 125 Pi = 155Pi Aia iarasi,nu e corect. Ma refer la matematica pura, ai gresit calculele.. x * ( a + b) + (c + d) nu este egal cu x * (a + b) + x * (c + d). love is a verb Love is a doing word
+FML Posted June 10, 2015 Author Report Posted June 10, 2015 D'aia-i moarta formula...N-am inteles ultima parte,dar incerc sa reiau pas cu pas,ca sa vezi unde nu-i bine.970 = Pi(1+30/100)(1+25/100).30/100 si 25/100 sunt fractii.Ori,ca sa aduni 2 fractii,ai nevoie de numitor comun.Deci,1 ala,il amplific cu 100 si-mi da 100.Nu mai scriu numitorul daca-i comun.am 970 = Pi(100+30)(100+25)deci 970 = Pi(130)(125)Pi = 970/(130x125).Nu asa?
+GodsOtherHand Posted June 10, 2015 Report Posted June 10, 2015 (edited) Nu uita ca numitorul la inmultire nu tre sa fie comun, si se inmulteste si el. Punel, ca ultima relatie arata oleaca altfel cand ai si numitorul.. Edited June 10, 2015 by GodsOtherHand love is a verb Love is a doing word
+FML Posted June 10, 2015 Author Report Posted June 10, 2015 (edited) Acum? Edited June 12, 2015 by Terror
+GodsOtherHand Posted June 13, 2015 Report Posted June 13, 2015 Acum ce? fa calculul... nu sti sa inmultesti matricile, sau unde te-ai impotmolit? love is a verb Love is a doing word
+FML Posted June 13, 2015 Author Report Posted June 13, 2015 (edited) Pai vreau sa le fac o chestie,asa ma invatase profesorul.Ca sa ''fie bine'' : Simplifici pe diagonala.Pi = 970/(1,30*1,25)Pi = 970/1,625Dar e urat... Edited June 13, 2015 by Terror
+GodsOtherHand Posted June 13, 2015 Report Posted June 13, 2015 bah, rezultatu pare ok. Daca aduni 25% si dupaia din rezultat mai aduni 30%, iti da 970. love is a verb Love is a doing word
+FML Posted June 13, 2015 Author Report Posted June 13, 2015 Mersi fain.P.S:Gata si cu anul asta...Am avut doar 8 la mate...Sa fie bine?
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