How do you calculate this limit without using l’Hospital’s rule: lim (x^2 + 5x - 4 / x+7 ) as x → 7 ?
1 Answer
Apr 13, 2018
Explanation:
#"evaluate using direct substitution"#
#lim_(xto7)(x^2+5x-4)/(x+7)#
#=(49+35-4)/14=40/7#
