Question

is |a+b| = |a| + |b| for all rarional numbers a and b? give reason(s) for your answer​

Answer 1

Answer:

No.

Step-by-step explanation:

Let us take a as some positive number say, 7 and b as some negative number say, -3. Adding both gives 4 in LHS. But in RHS mod of -3 becomes positive also the answer is 10. So LHS not equal to RHS. In case of doubt message me.