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Gente ser vo6 entenderam ai dar pra mim essas inequaçoes
1) resolva as inequaçoes seguintes no universo R
a)2x/2-1≥ x/10+3x/8
b)4x-3(x+2)/4<1/2+2(1-3x)
c)2a-a-4/2≠1
ajude ai


RESOLVENDO

Agora sim!
a)
\( \frac{2x}{2} -1 \geq \frac{x}{10} + \frac{3x}{8} \)
mmc(2,10,8)=40
\( \frac{40x-40 \geq 4x+15x}{40} \)
\( 40x-4x -15x \geq 40 \)
\( 21x \geq 40 \)
\( x \geq \frac{40}{21} \)
b)
\( 4x- \frac{3(x+3)}{4} < \frac{1}{2} +2(1-3x) \)
mmc(2,4)=4
\( \frac{16x-3(x+2)<2+8(1-3x)}{4} \)
\( 16x-3(x+2)<2+8(1-3x) \)
\( 16x-3x-6<2+8-24x \)
\( 16x-3x+24x<2+8+6 \)
\( 37x<16 \)
\( x< \frac{16}{37} \)
d)
\( 2a-a- \frac{4}{2} \neq 1 \)
\( 2a-a-2 \neq 1 \)
\( 2a-a \neq 1+2 \)
\( a \neq 3 \)



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