THU GON 3 mu 25 - 3 mu 4 tren 3 mu 21
Những câu hỏi liên quan
THU GON 3 mu 25 - 3 mu 4 tren 3 mu 21 - 1
Rut gon cac phan so
a) -21 / 49 ; 39 / -65
b ) 5 mu 4 . 7 mu 3 / 5 mu 5 . 7 mu 2 ; 2 mu 2 . 3 mu 5 . 5 / 2 mu 4 . 3 mu 4 . 5 mu 2
a)=-3/7
=-3/5
b)=625
=343
=3125
=49
c)=4
=243x5=1215
=16x81x25=32400
( x - 1 ) mu 2 : 5 mu 21 = 25 mu 30 . 5
2.3 mu x + 1 = 10.3 mu 12 + 8 : 27 mu 4
( 19x + 2 .5 mu 2) : 14 = ( 13 - 8 ) mu 2
1351 - 2 . ( x + 3) = 4 mu 12 : 8 mu 7 + 3
mong m.n giup mk vs !!!!
(x-1)^2:5^21=25^30.5
(x-1)^2=25^30.5.5^21
=(5^2)^30.5^22
= 5^60.5^22
(x-1)^2 =5^82
(x-1)^2=(5^41)^2
x-1=5^41
x=5^41+1
2.3^x+1=10.3^12+8:3^12
2.3^x+1=10+8=18
3^x+1=18/2=9
3^x+1=3^2
x+1=2
x=1
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rut gon A= 2 + 2 mu 2 + 2 mu 3 + 2 mu 4 +....+ 2 mu 8
A=2+22+23+24+...+28
=> 2A=22+23+24+25+...+29
=> 2A-A=29-2
A=29-2
A = 510
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2A = 2( 2 + 2^2 + .. + 2^8)
2A = 2^2 + 2^3 + .. + 2^9
2A - A = ( 2^2 + 2^3 +.. + 2^9) - (2 + 2^2 + .. +2^8)
A = 2^2 + 2^3 +.. + 2^9 - 2 - 2^2 -...- 2^8
A = 2^9 - 2
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bai 2, viet gon duoi dang 1 luy thua ;a, 3 mu 6 nhan 3 mu 8 b, 2 mu 7 nhan 2 mu 11 c 5 mu 4 nhan 5 mu 6 d,16 nhan 2 mu 5e, 3 mu 7 nhan 2 mu 7 f, 25 nhan 5 mu 7 nhan 125 g, 27 nhan 3 mu 4 nhan 9 h, 64 nhan 8 nhan 2 mu5giup minh voi thu 6 la minh can roi ai nhanh minh nhan like
Đọc tiếp
bai 2, viet gon duoi dang 1 luy thua ;
a, 3 mu 6 nhan 3 mu 8 b, 2 mu 7 nhan 2 mu 11 c 5 mu 4 nhan 5 mu 6 d,16 nhan 2 mu 5
e, 3 mu 7 nhan 2 mu 7 f, 25 nhan 5 mu 7 nhan 125 g, 27 nhan 3 mu 4 nhan 9 h, 64 nhan 8 nhan 2 mu5
giup minh voi thu 6 la minh can roi ai nhanh minh nhan like
tính tổng
B= 7-7 mu 4 + 7 mu 4 -........+7 mu 301
A = 1 + 5 mũ 2 + 5 mu 4 + 5 mu 6 +.....+5 mu 200
tính
A= 1/7+1/7mu 2 + 1/7 mu 3+......+1/7mu 100
B=-4/5+4/5 mu 2 - 4/5 mu 3 + ....+4/5mu 200
tính A=25 mũ 8 + 25 mũ 4 + 25 mu 20 +......+25 mu 4 +1 / 25 mu 20 + 25 mu 28 + 25 mu 26 +.....= 25 mu 2 +1
7 × 3 mu x + 20 × 3 mu x = 3 mu 25
6 mu 5 nhan 2 mu 7 tren 3 mu 4 nhan 2 mu 10
65 x. 27 : 34 . 210
= 65 x 1 : 34 . 23
= 46656 : 81 . 8
= 72(Chả biết đúng không nữa)
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\(6^5.\frac{2^7}{3^4}.2^{10}\)
\(=2^5.3^5.\frac{2^7}{3^4}.2^{10}\)
\(=2^{15}.3.2^7\)
\(=2^{22}.3\)
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cac bn giup mk nka
rut gon a=4 mu 5. 9 mu 4 - 2 . 6mu 9/2 mu 10. 3 mu 8+ 6mu 8 .20
5 mu 2 + 3 mu 2-(5mu 16 : 25 mu 7+3 mu 4 :3)
