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Question

The output of z3+2z2+5z+1, where z=1
  1. 1
  2. 2
  3. 3
  4. None of the above

A
2
B
1
C
3
D
None of the above
Solution
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z3+2z2+5z+1
=(1)3+2×(1)2+5×(1)+1
=1+25+1
=3

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