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limit x mendekati 0
4x / (√1-2x - √1+2x)
turunkan
4 / ((-2 / 2√1-2x) - (2 / 2√1+2x))
masukkan nilai 0
4 / ((-2 / 2√1-2(0)) - (2 / 2√1+2(0)))
= 4 / ((-2 / 2) - (2 / 2))
= 4 / (-1 - 1)
= 4 / -2
= -2
==========
lim x mendekati 0
3 - √2x + 9 / x
turunkan
0 - (2 / 2√2x + 9) / 1
= - 2 / 2√2x + 9
masukkan nilai 0
= -2 / 2√2(0) + 9
= -2 / 2√9
= -2 / 2.3
= -2 / 6
= -1/3
==========
√x + 4 - √14 - x / x² - 2x - 15
turunkan juga
((1 / 2√x+4) - (-1 / 2√14-x)) / 2x - 2
= ((1 / 2√x+4) + (1 / 2√14-x)) / 2x - 2
masukkan nilai 5
= ((1 / 2√5+4) + (1 / 2√14-5)) / 2(5) - 2
= ((1 / 2√9) + (1 / 2√9)) / 10 - 2
= (( 1 / 2.3) + (1 / 2.3)) / 8
= (1/6 + 1/6) / 8
= (2/6) / 8
= 2 / 48
= 1 / 24