Question 966219
{{{ln(x+1) + ln(x+3) < ln(x+7)}}}
{{{ln((x+1)(x+3)) < ln(x+7)}}}
{{{(x+1)(x+3) < (x+7)}}}
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*[illustration dd6.JPG].
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Look for values when the parabola is below the straight line,
{{{-4<x<1}}}
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However since the logarithm only takes positive values,
take the argument that has the minimum value, 
{{{x+1>0}}}
{{{x>-1}}}
Putting those two limits together,
{{{-1<x<1}}}
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