9.(2x-1)=117
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A/
\(a=63^{11}x16^{13}< 64^{11}x16^{13}=\left(2^6\right)^{11}x\left(2^4\right)^{13}=2^{118}\)
\(b=\left(2^5\right)^{17}x\left(2^3\right)^{19}=2^{142}\)
\(\Rightarrow b=2^{142}>2^{118}>a\)
B/
\(a< 8x2^{13}=2^3x2^{13}=2^{16}=b\)
\(\dfrac{1}{3}\)x + \(\dfrac{2}{5}\left(x-2\right)\) = 0
\(\dfrac{1}{3}\)x + \(\dfrac{2}{5}x-\dfrac{2}{5}.2\) = 0 \(\dfrac{1}{3}\)x + \(\dfrac{2}{5}x\) - \(\dfrac{4}{5}\) = 0 \(\dfrac{1}{3}\)x + \(\dfrac{2}{5}x\) = 0 + \(\dfrac{4}{5}\) \(\dfrac{1}{3}\)x + \(\dfrac{2}{5}x\) = \(\dfrac{4}{5}\) x (\(\dfrac{1}{3}+\dfrac{2}{5}\)) = \(\dfrac{4}{5}\) x. \(\dfrac{11}{15}\) = \(\dfrac{4}{5}\) x = \(\dfrac{4}{5}\) :\(\dfrac{11}{15}\) x =\(\dfrac{12}{11}\)-4.(1/1.2+1/2.3+...+1/97.98+1/98.99)
-4.(1/1.1/99) <dùng pp loại trừ>
-4.1/99=-4/99
\(\left(4x-1\right)^{\Lambda}3=\left(3x\right)^{\Lambda}3\)
9.(2x-1)=117
2x-1=117:9
2x-1=13
2x=13+1
2x=14
x=14:2
x=7
9.(2x-1)=117
2x-1=117:9
2x-1=13
2x=13+1
2x=14
x=14:2
x=7