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Question

Let f=(x+y+1)^i+^j(x+y)^k then f. curl f is equal to_____.
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Solution

The correct option is A 0
curlf=∣ ∣ ∣^i^j^kxyzx+y+11(x+y)∣ ∣ ∣=^i+^j^k

f.curl f=x+(y)1+1+x+y=0

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