haterofmath
limit of (x1)^2(x+1) as x approaches 3



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zzr0ck3r
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is there any reason you just cant plug in 3?

alexwee123
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^^ ya substitute 3 for x

haterofmath
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i dont think. there's any steps i would have to show?

LeeYeongKyu
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dw:1347497171437:dw

LeeYeongKyu
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do you mean this?

zzr0ck3r
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note: unless ding so makes you devide by zero, take a sqrt( a negative number ), or take a ln( negative number ), then you can plug in for x

zzr0ck3r
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you can show what ever step you would in algebra.

zzr0ck3r
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(31)^2 * (3+1) = 2^2 * 4 .....

haterofmath
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\[\lim_{x \rightarrow 2}(x1)^2(x+1)\]

haterofmath
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sorry not 2 but 3

zzr0ck3r
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3 or 2? Not that it makes a dif here, just plug in for x

zzr0ck3r
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ahh ...

zzr0ck3r
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now if it where lim x>3 of 1/(3x) then you could not just plug in for x because you would get 1/0

zzr0ck3r
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were

haterofmath
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find the indicated onesided limit. if the limiting value is inifinte indicate whther is is \[+\infty or \],
\[\lim_{x \rightarrow 4} (3x9)\]