Question

Evaluati numerele ce urmeaza:
a) (328)9, (328)10, (320)11, (328)16
b) (516)7, (516)8, (516)9, (516)16
ajutatima va rog frumos

Answer 1

Evaluati numerele ce urmeaza:
a) (328)9=3*9^2+2*9^1+8*9^0=3*81+2*9+8*1=243+18+8=(269)10  
   (9^2- e 9 la puterea 2 , adica 9*9=81)
    (328)10==3*10^2+2*10^1+8*10^0=3*100+2*10+8*1=300+20+8=(328)10
    (320)11=3*11^2+2*11^1+8*11^0=3*121+2*11+8*1=363+22+8=(393)10
    (328)16=3*16^2+2*16^1+8*16^0=3*256+2*16+8*1=768+32+8=(808)10
b) (516)7=5*7^2+1*7^1+6*7^0=5*49+1*7+6*1=245+7+6=(258)10
    (516)8=5*8^2+1*8^1+6*8^0=5*64+1*8+6*1=320+8+6=(334)10
    (516)9=5*9^2+1*9^1+6*9^0=5*81+1*9+6*1=405+9+6=(420)10
    (516)16=5*16^2+1*16^1+6*16^0=5*256+1*16+6*1=1280+16+6=(1302)10