Asked by Marina
If lim(f+g)=1 as x-->a
and lim(f-g)=1 as x-->a
find lim fg as x-->a
and lim(f-g)=1 as x-->a
find lim fg as x-->a
Answers
Answered by
Graham
Hint:
(f+g)^2 - (f-g)^2 = 4 fg
(f+g)^2 - (f-g)^2 = 4 fg
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