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question mark

The value of √(log20.5 4) is

1) -2

2) -4 (in root)

3) 2

4) None of these

Vishrant Vasavada , 15 Years ago
Grade 11
anser 2 Answers
askiitian.expert- chandra sekhar

Last Activity: 15 Years ago

Hi Vishrant,

The value of √ should always be positive √(x2) =|x|

Therefore the answer is 2

Badiuddin askIITians.ismu Expert

Last Activity: 15 Years ago

hi Vishant

you should remember that √(a2)=|a|

so √(log20.5 4)=|log0.5 4|

                         =|log2-1 22|

                           =|-2 log22|

                          =2 log22

                           =2        { sinse we know logaa=1}

so option 3 is correct

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