Lời giải:
$A=1+3+3^2+3^3+...+3^9+3^{10}$
$3A=3+3^2+3^3+3^4+...+3^{10}+3^{11}$
$\Rightarrow 3A-A=3^{11}-1$
$\Rightarrow 2A=3^{11}-1$
$\Rightarrow 2A+1=3^{11}$
Hay viet 2A + 1 duoi dang mot luy thua
Cho A= 1 + 3 + 32 + ..... + 32007
Cho A=1+3+3^2+...+3^10.Hay viet :
2A +1 duoi dang luy thua
Giúp mình voi ,mình đang cần gấp
viet cac tich sau duoi dang luy 1 luy thua
82.324=?
273.94.243=?
cho A=1+2+2^2 +2^3 +...+2^200 .hay viet A+1 duoi dang mot luy thua
cho a =1+2+22+23+.....+2200.hay tinh A+1 duoi dang 1 luy thua
viet ket qua cac phep tinh sau duoi dang luy thua 329:64
viet so 729 duoi dang 1 luy thua voi 3 co so khac nhau ( so mu > 1)
Viet cac tich sau duoi dang 1 luy thua
2.2.2.3.3.6^2.3
viet cac tich sau duoi dang 1 luy thua
a/ -8 . -3 . +125
b/ 27 . -23 . -7 .+49
