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why there is sign of question mark at the end of formulas????

why there is sign of question mark at the end of formulas????

Grade:Select Grade

3 Answers

Nishant Vora IIT Patna
askIITians Faculty 2467 Points
6 years ago
Dear Student,
Pls tell me which question mark sign you are talking about?

Thanks
Saurabh Kumar
askIITians Faculty 2411 Points
6 years ago
Every sign has its mean, thats why...
Adarsh
733 Points
6 years ago
Please tell at the end of whic formulae there is sign of question mark.

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