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If Δ is an operation on integers such th...

If `Δ` is an operation on integers such that for integers `a\ a n d\ b ,\aΔb=a-b-(-5)` Find the value of (i) `(-7)Δ3` (ii) `(-9)Δ(-4)` (iii)`2Δ5` (iv) `4Δ(-5)`

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