2+2= 4+210=
3+3= 4+324=
8^x+3 + 2^x*3 - 3*2^x+4 * 4^x+1 = 324
(-2)^4 . 3^x-1 =324
(-2)^4 . 3^x-1 =324
\(\left(-2\right)^4.3^{x-1}=324\)
\(16.3^{x-1}=324\)
\(3^{x-1}=\frac{324}{16}\)
\(3^x:3=\frac{81}{4}\)
\(3^x=\frac{243}{4}\left(vl\right)\)
(-2)4.3x-1=324 => 16.3x-1 = 324 => 3x-1 = 324:16 => 3x-1 = 81/4 => 3x:3 = 81/4 => 3x = 81/4.3 => 3x =243/4 (tự tính tiếp nhé bạn) ...
a) 5√1,96 - 4√2,25 + 3√1,69
b) 1/3√49 + 3/4√324 - 2/3√400
c) 5/6√289 - 1/2√256 + 2/5√225
d) 15√16/25 + 12√9/16 - 18√16/81
a: =5*1,4-4*1,5+3*1,3
=7-6+3,9=4,9
b: =1/3*7+3/4*18-2/3*20
=7/3+54/4-40/3
=-11+54/4
=2,5
c: =5/6*17-1/2*16+2/5*15
=85/6-8+6
=85/6-2
=73/6
d: =15*4/5+12*3/4-18*4/9
=12+9-8
=12+1=13
584 x 2 +236 x 3 +324 x 4=
4 bạn nhanh nhất mình sẽ tick nha
584 x 2 + 236 x 3 + 324 x 4
= 1168 + 708 + 1296
= 3172
584 x 2 + 236 x 3 + 324 x 4
= 1168 + 708 + 1296
= 1876 + 1296
= 3172
x^3+5x^2+8x+4
x^3-6x-x+30
x^3-7x-6
x^4-324
a, \(x^3+5x^2+8x+4=x^3+x^2+4x^2+4x+4x+4\)
\(=x^2\left(x+1\right)+4\left(x^2+2x+1\right)=x^2\left(x+1\right)+4\left(x+1\right)^2=\left(x^2+4\right)\left(x+1\right)\)
b, \(x^3-6x^2-x+30=x^3+2x^2-8x^2-16x+15x+30\)
\(=x^2\left(x+2\right)-8x\left(x+2\right)+15\left(x+2\right)\)
\(=\left(x+2\right)\left(x^2-8x+15\right)=\left(x+2\right)\left(x^2-8x+16-1\right)\)
\(=\left(x+2\right)\left[\left(x-4\right)^2-1\right]=\left(x+2\right)\left(x-3\right)\left(x-5\right)\)
x+2/327+x+3/326+x+4/325+x+5/324+x+349/5=4
tìm x biết x+2/327+x+3/326+x+4/325+x+5/324=-4
tc tỉ lệ thức,ta có (ra số hơi to thông cảm )
\(\Leftrightarrow\frac{22990993x+80556557}{1870865100}=-\frac{4}{1}\Rightarrow\left(22990993x+80556557\right)1=-1870865100.4\)
\(\frac{\left(22990993x+80556557\right)1}{22990933x}=-\frac{1870865100.4}{22990993x}\)( chia 2 vế cho 2290933x)
\(\Rightarrow\frac{22990933x+80556557}{22990933x}=-\frac{1870865100.4}{22990933x}\)
=>x=-329
\(\frac{x+2}{327}+\frac{x+3}{326}+\frac{x+4}{325}+\frac{x+4}{324}+\frac{x+324}{5}=0\)
Tìm x