OSWAL Model Isc comp papers

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These questions could be imp for comp..pls answer them if u know..they are from Oswal Comp papers..

1. Find the complement of F(a,b,c,d) using De Morgan's laws.Show the relevant reasoning. ( Is the question correct ??

)

2. Convert the following product-of-sums form into its corresponding sum-of-products form :
F(x,y,z)=pi(2,4,6,7)
( How to do this ??)

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i am not sure of the first question but the second is done using K map..!!

use K map to fill the corresponding cells with 0 [as it is a POS] and the rest of the cells will be the SOP..write them out using corresponding indices and simplify them..!

it sounds difficult but it is quite easy...!!!

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accord 2 me first question is incomplete....

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what is the paper number for first ques? i mean which paper is it in?

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In my edition its in unsolved MODEL SPECIMEN PAPER - 17

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i figured out another way ..though im not very sure of the logic..
convert 2,4,6,7 to their binary form..
complement it..
and convert back to integers..
ul get the SOP nos--5,3,1,0
now u can get F..

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whats F() anyway..???

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it is F(X, Y, Z)= X'YZ + X'Y'Z
soln:
(X'YZ + X'Y'Z)'
=(X'YZ')'.(X'Y'Z)'
=(X+Y'+Z)(X+Y+Z')

??????But isn't it a solved paper???

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what is the criterion for this thingie..??

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i dont get u..!

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if the question is F(a,b,c,d)...??

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second one can be done using truth table too.......

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yea..i guz u can..! Using truth table is simpler than K map..isin't it..?? Like a Star @ heaven

But i always like to do things the hard, standard complex way in computer so that i can use up whole time..!! Twisted Evil

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i hope u will be able to finish after all.
Rolling Eyes

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I dont fear computer science..! It has been my jackpot all these years..! It has got me out of jail several times..!! I hope my "overvaulting ambitions" do not bring about my downfall by "misplacing trust"...!!!!