limx tends to 1. 7x-7÷x-1
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Limx->inf (1+1(7x)) =
Lim y->inf (1+1/y)^(y/7), where y=7x or x=1/7 and x->inf=>7x=y->inf.
=Limy-inf{ [1+(1/y)]^y }^(1/7)
= { e }^(1/7)
=e^(1/7).
Lim y->inf (1+1/y)^(y/7), where y=7x or x=1/7 and x->inf=>7x=y->inf.
=Limy-inf{ [1+(1/y)]^y }^(1/7)
= { e }^(1/7)
=e^(1/7).
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