Question

simply
1). add -7/5 and 2/7
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Answer 1

Answer:

7/5+2/7= 9/12

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Answer 2

Answer:

We can do this by two methods1.12+14+18First make denominator same bymultiple by some quantity1.42.4+1.24.2+18=4+2+18=782.Second method is using the formula of G.PS3=a(rn−1)r−1S3=(12)[(12)3−1](12)−1=78