lim [((2x+1)^0.5)-3]/[x-4] x-->4
and multiply the top out so = lim (2x+1 - 9)[(x-4)(√(2x+1) + 3) x--->4 = lim 2/(√(2x+1) + 3) x --->4 = 2/6 = 1/3
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