4.52x=57-56
=>4.(52)x=78125-15625
=>4.25x=62500
=>25x=62500:4
=>25x=15625
=>25x=56
=>25x=(52)3
=>25x=253
=>x=3
4.52x=57-56
=>4.(52)x=78125-15625
=>4.25x=62500
=>25x=62500:4
=>25x=15625
=>25x=56
=>25x=(52)3
=>25x=253
=>x=3
2^2x+3 -3.2^7=2^7
5^x+3 -4.5^4=5^4
(3x-5):2=4.5
9.(x+3)-205+4.5
70-(2x-50)=0
8.5-(x+7)=3.10
17-(x:12)=17
32.8-x=100.2
Tính giá trị các biểu thức sau.
a) A = 7^ 0 + 7^ 1 + 7^ 2
b) B =(7^5 + 7^9 ).(5^4 + 5^6 ).(2^3.4-2.2^4 )
c) C =3 ^2 .[(5^2 – 3) : 11] – 2^ 4 + 2.5^3
d) D = 9 ^2 − {5^ 2 − [5^ 2 − 2(4.5 − 3^ 2 )]}
câu 1:Thực hiện phép tính:
a, A= -6.(-8+5):3-7.(-2) b, B= 4.5^2+24.(-5) +9
câu 2: tìm x
a, -8.|x|=(-4)^3
b,(4,5-2x).1 4/7= 11/4
GIÚP VS MAI MIK PHẢI NỘP RỒI
(2x-15)^5=4.5^5
Tìm x
tim x biet
1) 23x-1=32
2) 4.52x=5^7-5^6
3) x3(x2-1)=0
4) x100=x48
5) x100=x
6) x100=x2
7) (x-2015)2105=1
8) 100(x-3).(x-2)=1
(2x+24).53=4.55
257-(3x+25)=157
x-140:35=270
23-(x:13)=18
9(x+5)-13=671
9(4x)-13=24
(x-5)-34:17=1
.(2x-7). 3=3 dấu chấm là nhân nhé
(3x-5):2=4.5
9.(x+3)-20=5+4.5
70-(2x-50)=0
8.5-(x+7)=3.10
17-(x:12)=17
32.9-8x=100.2
9.(x+5)-13=671
5.(x+5)-2.24=2.26
4.(x+1)-28=3.4
giúp mk mk tích cho
bài 1 tính
a) (3/7+-9/8)+(5/8+-6/14)
b) (-5/7+3/11)+(-11/14+14/-11)
c)(-4/5+2/3)+(-5/4+19/5)+(7/3.2)
d)9/16.13/4-9/4.5/16+9/16.17/4