Câu 1:
\(\Leftrightarrow6x-18-8x-4-2x+8=4-3\left(2x+1\right)+5\left(2x-1\right)\)
=>-4x-14=4-6x-3+10x-5
=>-4x-14=4x-4
=>-8x=10
hay x=-5/4
tim x thuoc N
a,\(\dfrac{1}{4}\cdot\dfrac{2}{6}\cdot\dfrac{3}{8}\cdot...\cdot\dfrac{31}{64}=2^x\)
b,\(\left(x-3\right)^3=125^2\)
c,\(7^{x+2}+2\cdot7^{x-1}=345\)
d,\(3^{x-5}-81=0\)
bai hoi dai cac ban giup mk
\(\left(3-x\right)^6=\left(3-x\right)^4\) \(\left(3^2\right)^2+2^x=5\left(5+2^2.3\right)\) \(5^{x-1}+5^x=150\)
a) \(\dfrac{45^3.20^4.18^2}{180^5}\)
b)\(\dfrac{4^9.3^6+64^4}{16^4.100}\)
Bài 2: Tìm x
a)\(\left(2x+1\right)^3=27\)
b)\(3^{2x+1}.11=297\)
c)\(\left(7x-11\right)^3=2^5.5^2+200\)
d)\(\left(x-5\right)^4=\left(x-5\right)^6\)
Ngày mai đi học rùi, cần lắm
1.tính c = \(\left(1\cdot2\cdot3\cdot4+2\cdot3\cdot4\cdot5+...+18\cdot19\cdot20\cdot21\right)-5-10-15-...-200\)
2. tính d = \(\dfrac{1}{1\cdot2\cdot3}+\dfrac{1}{2\cdot3\cdot4}+...+\dfrac{1}{18\cdot19\cdot20}-\dfrac{3}{1\cdot2}-\dfrac{3}{2\cdot3}-...-\dfrac{3}{19\cdot20}\)
3.tìm x: \(2\left(x-3\right)-3\left(1-2x\right)=4+4\left(1-x\right)\)
4.tìm x: \(\dfrac{x-2}{2}-\dfrac{1+x}{3}=\dfrac{4-3x}{4}-1\)
giải nhanh giùm tớ nhé. ghi cả lời giả ra kìa
Tìm x,y nguyên
a)\(10^x+y^2=5042\)
b) \(x^2y-x+xy=6\)
c) \(\left|x-2\right|=\left|2x+5\right|\)
d) \(\left|x-3\right|=2x+4\)
e) \(x+2\ge1\)
f) \(12\le\left|x+1\right|\le15\)
tìm x thuộc N biết
a, \(2^6-2x+3.5^x=2^2.3^2+2^4\)
b, \(2.5^{x+1}+3.5^x=2^2.3+1\)
c, \(3^2+2^4-\left(6^8:6^6-6^2\right)< 5^x< 125\)
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:
\(A=\dfrac{11.3^{22}.3^7-9^{15}}{\left(2.3^{14}\right)^2}\)
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~
A) \(\left(25^6-15^6-10^6\right):5^6\)
B)\(1+2+2^2+2^3+...+2^{100}\)
C)\(7-7^4+7^5-...+7^{301}\)
