1.tim x:
a, 96-3(x+1)=42
b, 5(x+35)=515
c, 12x-33=3 mu 2 nhan 3 mu 3
bai 1; so sanh
a, 3 mu 600 va 2 mu 900 b, 2 mu 360 va 3 mu 240
c, 3 mu 236 va 2 mu 354
bai 2,tim x biet ;
a,5 mu x + 5 mu x +2 =650
b, 2 mu x +3 +5 nhan 2 mu x +2 - 2 mu x + 1 = 208
bai 3,tinh tong;A=3 + 3 mu 2 + 3 mu 3 +3 mu 4 +.........+3 mu 2019 +3 mu 2020
tim cac gia tri cua x de bieu thuc sau nhan gia tri am
a)x mu 2 + 5x b)x mu 2 - 5/2x c)3(2x+3)(3x-5) d)x - 2/x-6 e) x mu 2 -1/x mu 2
tim x thuoc N:
a) 2 mu x =4 nhan 128
b)2 mu x nhan 3 mu x =4 nhan 9
2^x = 4 . 128 = 512
2^x = 2^9
=> x = 9
b) 2^x . 3^x = 4.9
=> 2^x . 3^x = 36
=> x = 2
2\(^x\)=4.128
2\(^x\)=512
2\(^x\)=2\(^9\)
=> x=9
đúng nha
Cậu ấn vô đây:Giúp tôi giải toán - Hỏi đáp về toán học - Học toán với OnlineMath
tim cac gia tri cua x de bieu thuc sau nhan gia tri duong
a) x mu 2 + 4x b)2x mu 2 - 4x c)(x-3)(x+7) d)5(3x +1 )(4x-3) e)(1/2-x)(1/3-x)
1) tim x thuoc n biet:
a) 3 mu 4 - x = 81
b) 5 mu x -1 = 125
c) (2 - x) mu 3=27 mu 0
d)3 mu x + 2 -3 mu x +1=182
e) 2 mu x -1 -2 mu x =16
3 mũ 4-x=81 là viết như này hả bn
\(3^{4-x}=81\) hay viết như này \(3^4-x=81\)
Hoang Thi Thanh Tra
viet nhu cai thu nhat
a mu 1 nhan a mu 2 nhan a mu 3 nhan ..... a mu 100 = a mu x
hoi x bang bao nhieu
Bg
Ta có: a1.a2.a3.....a100 = ax
=> a1 + 2 + 3 +...+ 100 = ax
=> x = 1 + 2 + 3 +...+ 100
=> x = \(\frac{\left(100+1\right).100}{2}\)
=> x = 5050
Vậy x = 5050
Ta có :
a1 . a2 . a3 . ........ . a100 = ax (x thuộc N)
=> a1 + 2 + 3 +....+ 100 = ax
=> 1 + 2 + 3 + ....... + 100 = x
=> x = (100 + 1) . [(100 - 1) : 1 + 1] : 2
=> x = 5050
Vậy x = 5050
a^1xa^2xa^3x...xa^100=a^1x2x3x...x100
B1) Tinh
a) 245-4 . [15: 8 +2.(4+3 mu 2 -9)]
b) 375: 5 mu 3 -( 3 mu 8: 3 mu 6 -2 .2 mu 3)
B2: Tim x
a) 2x -2 mu 3 .3 mu 2=138
b) ( 6x- 3 mu 4) . 7 mu 3= 3 . 7 mu 4
c) 1+2+3+..............+x =500500
tim, biet
a. x + 5 = 3
b. 12x - 64 = 2 mu 5
a, \(x+5=3\)
\(\Leftrightarrow x=3-5\)
\(\Leftrightarrow x=-2\)
Vậy ....
b, \(12x-64=2^5\)
\(\Leftrightarrow12x-64=32\)
\(\Leftrightarrow12x=32+64\)
\(\Leftrightarrow12x=96\)
\(\Leftrightarrow x=96:12\)
\(\Leftrightarrow x=8\)
Vậy ..
a,\(x+5=3\)
\(x=-2\)
b,\(12x-64=2^5\)
\(12x-64=32\)
\(12x=96\)
\(x=8\)
A,x+5=3
x=3-5
x=-2
B,12x-64=25
12x-64=32
12x=32+64
12x=96
x=96:12
x=8
541 +(218 - x)= 735
5(x+35) = 515
96 - 3(x+1) = 42
12x - 33 = 3mũ 2 . 3mũ 3
a).\(541+\left(218-x\right)=735\)
\(218-x=735-541\)
\(218-x=194\)
\(x=218-194\)
\(x=24\)
b).\(5\left(x+35\right)=515\)
\(x+35=515:5\)
\(x+35=103\)
\(x=103-35\)
\(x=68\)
c).\(96-3\left(x+1\right)=42\)
\(3\left(x+1\right)=96-42\)
\(3\left(x+1\right)=54\)
\(\left(x+1\right)=54:3\)
\(\left(x+1\right)=18\)
\(x=18-1\)
\(x=17\)
d)\(12x-33=3^2\cdot3^3\)
\(12x-33=3^5\)
\(12x-33=243\)
\(12x=243+33\)
\(12x=276\)
\(x=276:12\)
\(x=23\)
\(Nhớ\)\(tk\)\(mình\)\(nha\)\(!\)