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Difficulties in calculating limits in Wolfram|Alpha

Posted 10 years ago

Hi!

There is a function f(x) defined with rules:

f(x)=-3x if x>=5

f(x)=-(1/x) if x<5

how can I input these rules and calculate limits and show graphics of function?

Thank you so much.

POSTED BY: Robson Melo
5 Replies
Posted 10 years ago

Awesome, Mr. Bill. Thanks a lot!

POSTED BY: Robson Melo
Posted 10 years ago
Posted 10 years ago

Is possible type directly in wolfram alpha any sentence which could result instructions as Piecewise, or the only way is create an specific function?

POSTED BY: Robson Melo
Posted 10 years ago

Thanks, Mr. Bill. I appreciate your help.

POSTED BY: Robson Melo
Posted 10 years ago

.

f[x_] := Piecewise[{{-3 x, x >= 5}, {-1/x, x < 5}}]

Limit[f[x], x -> 4]

Plot[f[x], {x, 0, 10}]
POSTED BY: Bill Simpson
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