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Tarun Kumar

· started a discussion

· 1 Months ago

tarun (Question: 248828.0 )

can u clear 2nd line of solution,,,

Question:
If a2 + b2 + c2 = 1, then which of the following can not be a value of (ab + bc + ca).
Options:
A) 0
B) \(\cfrac{1}{2}\)
C) \(-\cfrac{1}{4}\)
D) –1
Solution:

Ans: (d) 


Ashok Choudhary

· commented

· 1 Months ago

Square of a real number is always non-negative(>=0).
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