tìm x
A,5.(x+2)=25
b,3.(2-x)+15=(-3).7
c,3 mũ x-2-7=2 mũ 2.5
Tìm x, biết:
a)2.52.32+{[2.53-(5.x+4).5}}:(22.3.5)}=453
b)\(|x-\frac{1}{3}|=2\)
a) 2/2.5 + 2/5.8 + 2/8.11 + ... + 2/x.(x+3)=7/23
b) 3/4 . x - 1/5 = 7/4 . x + 11/5
A=3^x+3^x+1
B=5^x+5^X+2
C=5^2x-3-2.5^2=5^2.3
D=3^x+2+3^x=810
Bài 1:
a) x^10 = x
b) 5^x+2+5^x = 26
c) 3^ x+2 + 3^x - 10=0
d) 5^2x - 3 - 2.5^2 = 5^2 : 3
a) 5. ( 7 + 48 : x ) = 45
b) 5²x-³ - 2.5² = 5² . 3
a) 5^x =125
b) 3^x = 81
c) 5^2x-3 - 2.5^2 = 5^2 . 3
Đề bài : Tìm x
a, Tìm x biết 1+5+9+13+...+x=501501
b, 2x-1+33 = 52+2.5
tìm x :
a |x-5|+2x+3=11 b x-7+|3-x|=10. c 5^2x-3-2.5^2=5^2.3
