107.10x+3=217.517
107.10x+3=(2.5)17
107.10x+3=1017
107.10x+3=107.1010
=>10x+3=1010(vì107=107)
=>x+3=10
x =10-3=7
vậy x=7
x2017=x
=>x=1
vì 1 mũ 10,124,24,45,347,87,...thì luôn luôn bằng chính nó (bằng 1)
A=3 mu 100 - 3 mu 99 +3 mu 98 - 3 mu 97 + ... +3 mu 2 - 3 mu 1. Tim n biet 3 + 4A = 3 mu n
Tim x \(\in\) N
a)\(^{3^{x-2}}\)
b)\(3.4^{x-2}\)=19.2
c)\(5^{x+1}+5^{x+2}\)=810
d)\(\left(x-1\right)^5-\left(x-1\right)^2=0\)
e)\(2^x-15=17\)
Cac ban oi cac ban lam giup minh voi mai minh phai nop bai roi
tìm x thuộc z biet (x ^3+7).(x^+12).(x^3+65).(x^3+130)<0
tìm x thuộc z biet (x ^3+7).(x^+12).(x^3+65).(x^3+130)
ai lam dung mk tk cho nhe
nho cac ban giup minh nhe
1.tim x thuoc N biet:
a)(2x+1)mu 3=125 b)(x-5)mu 4=(x-5)mu 6 c)2 mu x-15=17 d)(7x-11)mu 3=2 mu 5. 5mu 2+200
2.viet cac tich sau hoac thuong duoi dang luy thua cua mot so:
a)2 mu 5 . 8 mu 4 b)25.125 c)25 mu 5:25 mu 7
3.viet cac tich, thuong sau duoi dang luy thua:
a) 2 mu 10:8 mu 3 b)12 mu 7:6 mu 7 c)5 mu 8:25 mu 2
4.tinh gia tri cac bieu thuc sau:
a mu3 . a mu 9 (a mu 5)mu7 (a mu 6)mu 4. a mu 12 4.5 mu 2-2.3 mu 2
(x-2)^3-27^2=0
tim x
\(\left(x-3\right)^3=8^4\) tim x
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
\(27< 3^{x-2}< 243\) tim x
giup mk