3x 3x 3х+1-1 3х+1 1
limₓ→∞(1 +-------- -1)⁵ˣ= ( --------------)⁵ˣ = (---------------)⁵ˣ =(-------- - ---------)⁵ˣ =
3x+1 3x+1 3х+1 3х+1 3х+1
1
= (1- ---------)⁵ˣ = учтем ,что u=-(3x+1 )⇒ x=- (u+1)/3
3х+1
= (1 + 1/u )^(5*(-(u-1)/ 3) )= (1 + 1/u )^(-5u/3 - 5/3) = (1+1/u)^(-5u/3) * (1+1/u)^(-5/3)=
= limₓ→∞((1+ 1/u)^(u) )^(-5/3) *limₓ→∞1/ (1+1/u)^(5/3) =
=limₓ→∞((1+ 1/u)^(u) )^(-5/3) *1= limₓ→∞((1+ 1/u)^(u) )^(-5/3)=
(1+ 1/u)^(u)- второй замечетельный предел равен е
limₓ→∞((1+ 1/u)^(u) )^(-5/3) =е⁻⁵/₃
x-3 3-3 0
limₓ→₃(-------------- ) = -------------- = --------- = 0
4-√(3+7) 4-√10 4-√10