\(121:\left(2\times x-1\right)=121\\ 2\times x-1=121:121\\ 2\times x-1=1\\ 2\times x=1+1\\ 2\times x=2\\ x=2:2\\ x=1\)
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B=(121-12) x (121-22) x (121-32) ... x (121-292)
1/x*5 = 121/27830
1 12345
1 1234567
123 12345 123456789
121 121
123 12345 123456789
Tìm X:
2 x X - ( 67 + 34 ) : 2 = 121
598 + (123 -121) x 2
( 14/9: 2/121)x 3/77
Tìm X,biết:
a) \(X+X+\dfrac{1}{2}x\dfrac{2}{5}+X+\dfrac{8}{10}=121\) b) \(\dfrac{12+x}{42}=\dfrac{5}{6}\)
[1-1/4]x[1-1/9]x[1-1/16]x.....x[1-1/100]x[1-1/121]
( x x 2 ) + ( x x 5 ) + ( x x 8 ) + ... + ( x x 119 ) = 121