Question

Add a + b – 1, b – a + 1, 1 – 2b

(a) 1

(b) -1

(c) 2

(d) -2
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Answer 1

Answer:

1

answer

=a+b-1 + b-a+1 + 1-2b

=keeping all like term with each other

=a-a+b+b-2b-1+1+1

=1