1.

सिद्ध कीजिये कि फलन ` f(x) = {{:( ( sin x ) /(x)",",, x ne 0) , ( 1",",, x = 0 ):} `, बिंदु x =0 पर सतत है |

Answer» ` f ( 0 - 0 ) = lim _ ( hto 0 ) f ( 0 - h ) = lim _ ( hto 0) ( sin ( -h ) ) /(-h ) = lim _ ( hto 0) (sin h ) /(h) = 1 `
`f ( 0 + 0 ) = lim _ ( hto 0 ) f( 0 + h) = lim _ ( hto 0) (sin h)/(h) = 1 `
और ` f (0) = 1 `
स्पष्टतः ` f (0+ 0 ) = f ( 0 - 0 ) = f (0 ) `


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