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Limit tak hingga
.
lim(x->~) { √(2x-1) - √(x+4)} =..kali akar sekawan
lim(x->~) { √(2x-1)-√(x+4)}{√(2x-1) +√(x+4)} / {√(2x-1) +√(x+4)}
lim(x->~) (2x-1 -x-4) / {√(2x -1) + √(x+4)}
lim(x->~) (x - 5)/ [ √(2x-1) + √(x+4)]
= (x/x - 5/x) / [√( 2x/x² - 1/x²) + √(x/x² +4/x²)]
= (1 - 5/x) / √(2/x - 1/x²) + √(1/x + 4/x²)
x = 0
= (1 - 0) / [√(0-0) + √(0 +0)
= 1/0
= ~