Asked by geoff
lim x^4-1/x-1
x->1-
x->1-
Answers
Answered by
Reiny
lim x^4-1/x-1
x->1
= lim (x^2+1)(x^2-1)/x-1
x->1
=limit (x^2+1)(x+1)(x-1)/(x-1)
x -->1
= lim (x^2+1)(x+1)
= (2)(2) = 4
x->1
= lim (x^2+1)(x^2-1)/x-1
x->1
=limit (x^2+1)(x+1)(x-1)/(x-1)
x -->1
= lim (x^2+1)(x+1)
= (2)(2) = 4
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