Question

Berapa hasilnya? Tolong dibantu
Lim √5+x - √5-x
x-->0 x

Answer 1

Kalikan sekawannya:
[(√5+x + √5-x)/(√5+x + √5-x)]
= lim ((5 + x) - (5 - x))/x(√5+x + √5-x)
x->0
= lim 2x/x(√5+x + √5-x)
x->0
= lim 2/(√5+x + √5-x)
x->0
= 2/2√5
= 1/√5
= (1/5)√5