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एक से अधिक उत्तर प्रकार के प्रश्न

Which of the following functions is/are continuous for xR?

xR के लिए निम्नलिखित में से कौनसा/कौनसे फलन सतत है/हैं?

A
f(x)=tan1x
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B
f(x) = {x}; {·} represents fractional part of x.

f(x) = {x}; {·}, x के भिन्नात्मक भाग फलन को दर्शाता है
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C
f(x) = |x + 4|
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D
f(x) = sgn(ex); sgn is signum function

f(x) = sgn(ex); sgn सिग्नम फलन है
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Solution

The correct option is D f(x) = sgn(ex); sgn is signum function

f(x) = sgn(ex); sgn सिग्नम फलन है
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