log10y+3log10x≥log10x\log_{10}y + 3\log_{10}x \geq \log_{10}xlog10y+3log10x≥log10x
⟹ log10y≥log10x−3log10x\implies \log_{10}y \geq \log_{10}x - 3\log_{10}x⟹log10y≥log10x−3log10x
log10y≥−2log10x=log10y≥log10x−2\log_{10}y \geq -2\log_{10}x = \log_{10}y \geq \log_{10}x^{-2}log10y≥−2log10x=log10y≥log10x−2
log10y≥log10( 1x2) ⟹ y≥ 1x2\log_{10}y \geq \log_{10}\left(\;\frac{1}{x^{2}}\right) \implies y \geq \;\frac{1}{x^{2}}log10y≥log10(x21)⟹y≥x21
