Bai 2 : Viet cac tich sau duoi dang luy thua cua co so 2 va 3
a,325 . 2566 . 102410
b, 279 . 2437 . 72912
c, 1213 . 189 . 2425
d, 1089 . 366 . 7217
Viet cac so (0,25)^8 va (0,125)^4 duoi dang cac luy thua cua co so 0 ,5
viet cac so sau duoi dang luy thua cua 1 so:
\(a)-\frac{8}{27}\)
\(b)\frac{81}{625}\)
viet cac tich sau duoi dang luy thua cua 1 so:
\(a)27.81\)
\(b)\frac{2}{5}.\frac{8}{125}.\frac{16}{625}\)
1.
a) \(-\frac{8}{27}=-\left(\frac{2}{3}\right)^3\)
b) \(\frac{81}{625}=\left(\frac{3}{5}\right)^4\)
2.
a) 27.81=2187=37
b) sai đề
1) Viet cac so 2 mu 27 va 3 mu 18 duoi dang luy thua co so mu la9
viet cac so 2mu27 va 3mu18 duoi dang cac luy thua co so mu la 9
\(3^2=9\)
nên \(3^{18}=\left(3^2\right)^9=9^9\)
Đáp số: \(9^9\)
viet cac so sau duoi dang luy thua cua 1 so tu nhien lon hon 1 viet nhieu cach neu co the la 9;16;27;81;64;625;10000
9=32 ; 16=42=24 ; 27=33 ; 81=92=34 ; 64=82=43=26 ; 625=252=54 ; 10000=1002=104
viet tich sau duoi dang mo luy thua co co so nho nhat:(23)5.25
Ta có: \((2^3)^5.2^5\)
\(=2^{15}.2^5\)
\(=2^{15+5}=2^{20}\)
( 23 )5 . 25
= 23.5 . 25
= 215 . 25
= 215 + 5
= 220
Vậy ...
\(\left(2^3\right)^5.2^5\)
\(=\left(2^{3.5}\right).2^5\)
\(=2^{15}.2^5\)
\(=2^{20}\)
Viết cac số (0,25)2 va (0,125)4 duoi dang luy thua cua cac co so 0,5
Hay viet cac so sau duoi dang luy thua cua 10:376473654;346754;645767456,38487
viet ket qua cac tich sau duoi dang mot luy thua voi co so la so tu nhien nho nhat co the duoc :
2*4*8*32*64
3*9*27*81*729
+) \(2\times4\times8\times32\times64\)
\(=2\times2^2\times2^3\times2^5\times2^6\)
\(=2^{1+2+3+5+6}\)
\(=2^{17}\)
+) \(3\times9\times27\times81\times729\)
\(=3\times3^2\times3^3\times3^4\times3^6\)
\(=3^{1+2+3+4+6}\)
\(=3^{16}\)
_Chúc bạn học tốt_