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01 Aug 2021, 05:59
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B
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If a and b are nonzero numbers and |a + b| = |a| + |b|, then which of the following must be true?
A. a = b
B. ab > 0
C. ab < 0
D. a > b
E. b > a
A. a = b
B. ab > 0
C. ab < 0
D. a > b
E. b > a
01 Aug 2021, 16:44
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SalahT
If a and b are nonzero numbers and |A+B|=|A|+|B| , then which of the following must be true?
A. a = b
B. ab > 0
C. ab < 0
D. a > b
E. b > a
A. a = b
B. ab > 0
C. ab < 0
D. a > b
E. b > a
If we square both sides of the equation we get \(A^2 + 2AB + B^2 = A^2 + B^2 + 2|A||B|\), then \(AB = |AB|\).
Hence AB has to be positive.
Ans: B
28 Feb 2022, 03:52
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Think about it logically.
This property can only be true if BOTH values are positive!
The only answers that fulfills this condition is B.
This property can only be true if BOTH values are positive!
The only answers that fulfills this condition is B.
