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###### Saima posted an Question
September 18, 2021 • 20:49 pm 30 points
• CSIR NET
• Physical Sciences

# Q40. where does the del come from in the option? ans.: (b)

The expression 2 1 Ox x x + +a+) is proportional to (a) d+x2 +a3 tX (++a +x ( e+++

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• ##### Bidyut sinha

see the second picture,I have attached...We are getting zero(0) if x1,x2,x3,x4 not equal to 0.. otherwise non zero...this is property of Dirac Delta

• ##### Anshum Sharma

First see the attached image then read this. Definition of delta is that it is zero at all the points except at one point it is infinity. so that is why this delta comes here.

i have already this image...but i have a prob that from where the delta suddenly come...and why b option why not a

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