Question

if limit as x approaches a F(x) + g(x)= 2 and limit as x approaches f(x) - g(x) =1 find the limit f(x)g(x)

Answer 1

x approaches what ?

Answer 2

sorry a for both

Answer 3

f(a) + g(a) = 2
f(a) - g(a) =1

solve for f(a) g(a) ..
hope that'd help..

Answer 4

i dont understand how tho

Answer 5

3/4

Answer 6

understand what? how the eqns came? or how to solve the eqns ?

Answer 7

how to solve or anything can you show steps?

Answer 8

(f+g)^2 -(f-g)^2 = 4fg -> 2^2-1^1 = 3 => lim fg = 3/4

Answer 9

but why do you square to f and g ?

Answer 10

the*