\(7^x+7^{x+1}+7^{x+2}=3\cdot19\cdot343\)
\(\Leftrightarrow7^x=343\)
hay x=3
\(7^x+7^{x+1}+7^{x+2}=3\cdot19\cdot343\)
\(\Leftrightarrow7^x=343\)
hay x=3
(7x-11)^3 = 5^2 * 2^5 + 200
(7x - 11)3=25.52+200
(7x-11)3=25.52+200
tìm x: 7x-x= 5^21: 5^19+ 3.2^2 - 7^0
X bằng bao nhiu vậy mn ???
Tìm x là số tự nhiên, biết:
1/ (x - 1)x + 2 = (x - 1)x
2/ x(6 - x)2003 = (6 - x)2003
3/ (7x - 11)3 = 25.52 + 200
4/ (x2 - 1)4 = 81
Khó quá, mong giúp đỡ sớm ạ!!
6x-2:12=3
3+2x-1=24-[42-(22-1)
(7x-11)3=25.52+200
Dấu "." là dấu nhân nha
tìm x:
a) \(2^x-15=17\)
b) \(\left(7x-11\right)^3=2^5.5^2+200\)
c) \(x^{10}=1^x\)
d) \(x^{10}=x\)
e) \(\left(2x-15\right)^5=\left(2x-15\right)^3\)
Hết~
1. Tìm x:
a) \(2^x-15=17\)
b) \(\left(7x-11\right)^3=2^5.5^2+200\)
c) \(x^{10}=1^x\)
d) \(x^{10}=x\)
e)\(\left(2x-15\right)^5=\left(2x-15\right)^3\)
2. Tính:
\(A=\dfrac{11.3^{22}.3^7-9^{15}}{\left(2.3^{14}\right)^2}\)