1.

दर्शाइये कि फलन `f(x)={{:(5x-4",","जब",0 lt x le 1),(4x^(2)-3x",","जब",1 lt x lt 2):}x = 1` पर संतत है ।

Answer» (i) `f(1)=5 xx 1-4=1`
(ii) R.H.L. `=underset(x rarr 1^(+))(lim)f(x)=underset(h rarr 0)(lim)f(1+h)`
`=underset(h rarr 0)(lim)4(1+h)^(2)-3(1+h)," "[because x = 1 + h gt 1]`
`=4(1+0)^(2)-3(1+0)`
`= 4 - 3 = 1`
(iii) L.H.L. `=underset(x rarr 1^(+))(lim)f(x)=underset(h rarr 0)(lim)f(1-h)`
`=underset(h rarr 0)(lim)5(1-h)-4," "[because x = 1 - h lt 1]`
`=5(1-0)-4`
`=5-4=1`
`therefore" "underset(x rarr 1^(+))(lim)f(x)=underset(x rarr 1^(-))(lim)f(x)=f(1)`
अत: फलन f(x) बिन्दु x = 1 पर संतत है ।


Discussion

No Comment Found

Related InterviewSolutions