X+1/1+2x+3/3+3x+5/5+....+20x+39/39=4/3+6/5+...+40/39
x+1/1+2x+3/3+3x+5/5+20x+39/39=22+4/3+6/5+...+40/49
Đề sai nhiều quá=>Mk k hiểu j cả bạn viết dưới dạng phân số và chép đúng đề bài lại nha
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Giai pt
x+1+2x+3/3+3x+5/5+.....+20x+39/39=22+4/3+6/5+.....+40/39
Tim x biet: x+1/1+2x+3/3+3x+5/5+...............+20x+39/9=22+4/3+6/5+................+40/39
BT :Giải phương trình
a,(x+1)/1 + (2x+3)/3 + (3x+5)/5 +.........+(20x+39)/39 = 22+ 4/5 +5/6 +....40/39
b,(x-20)+(x-19)+(x-18)+......+100+101=101
giải các phương trình sau :
\(\frac{x+1}{1}+\frac{2x+3}{3}+\frac{3x+5}{5}+...+\frac{20x+39}{39}=22+\frac{4}{3}+\frac{6}{5}+...+\frac{40}{39}\)
<=>\(\left(\frac{x}{1}+\frac{2x}{3}+\frac{3x}{5}+...+\frac{20x}{39}\right)+\left(\frac{1}{1}+\frac{3}{3}+\frac{5}{5}+...+\frac{39}{39}\right)=20+2.\left(\frac{1}{1}+\frac{2}{3}+\frac{3}{5}+...+\frac{20}{39}\right)\)<=>
\(\left(\frac{1}{1}+\frac{2}{3}+\frac{3}{5}+...+\frac{20}{39}\right).x+20=20+2.\left(\frac{1}{1}+\frac{2}{3}+\frac{3}{5}+...+\frac{20}{39}\right)\)
<=> \(\left(\frac{1}{1}+\frac{2}{3}+\frac{3}{5}+...+\frac{20}{39}\right).x=2.\left(\frac{1}{1}+\frac{2}{3}+\frac{3}{5}+...+\frac{20}{39}\right)\)<=> x = 2
(x+1) / 1 + (2x+3) / 3 + (3x+5) / 5+ ... + (20x + 39) / 39
= 22 + 4 /3 + 6 / 5 +... + 40 /39
<=> x+ 1+ 2x / 3 +1 + 3x / 5+1+...+20x / 39+1 = 22+4 / 3+6 / 5+8 / 7+...+38 / 37+40 / 39
<=> (1+2 / 3+3 / 5+4 / 7+...+19 / 37+20 / 39)x + 20 = 22+4/3+6/5+8/7+...+38/37+40/39
<=> (1+2/3+3/5+4/7+...+19/37+20/39)x = 2(1 + 2/3 + 3/5 + 4/7 +...+ 19/37 + 20/39)
<=> x = 2
giải các phương trình sau
a) x+1/1 + 2x+3/3 + 3x+5/5+...+20x+39/39 = 22 + 4/3 +6/5 +....+ 40/39
b) x^4+x^3-4x^2+5x-3=0
c) x(x-1)(x-4)(x-5)=84
d) 148-x/25 +169-x/23 + 186-x/21 + 199-x/19 = 10
tim x
a,\(\left(x-20\right)+\left(x-19\right)+\left(x-18\right)+....+200+201=201\)
b, \(\frac{x+1}{1}+\frac{2x+3}{3}+\frac{3x+5}{5}+....+\frac{20x+39}{39}=22+\frac{4}{3}+\frac{6}{5}+...+\frac{40}{39}\)
Làm phương trình sau :
a) x+1/1 + 2x+3/3 + 3x+5/5 + ... + 20x+39/39 = 22 + 4/3 + 6/5 + ... + 40/39
b) ( x - 20 ) + ( x - 19 ) + ( x - 18 ) + ... + ( x - 100 ) + 101 = 101
Ai làm được mình tick cho . Mình cảm ơn nhiều nhiều lắm <3
\(\frac{x+1}{1}\)+ \(\frac{2x+3}{3}\) + \(\frac{3x+5}{5}\) + ... + \(\frac{20x+39}{39}\) = 22 + \(\frac{4}{3}\)+ \(\frac{6}{5}\) + ... + \(\frac{40}{39}\)