Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
lim
a
,
b
mm-template-arrow-right-8
1
,
1
∂
2
∂
a
∂
b
2
a
+
b
b
e
t
a
a
,
b
Math Input
Natural Language
Math Input
