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प्रश्न
Examine continuity of the function f(x) at x = 0, where
`f(x) = (10^x + 7^x - 14^x - 5^x)/(1-cos 4x) , " for " x != 0`
`= 10/7 , " for" x = 0`
उत्तर
`f(0) = 10/7` ....(given)
Since `lim_(x->0) f(x) != f(0)`, f is discontinuous at x = 0.
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