Look at it under a lens. If you are still not sure then take it to a coin dealer and have them look at it.
One cent. The penny would have to be at least 60-70 years old to have any real value to a collector.
double
Basically you use a double-precision floating point number for the real part, a double-precision floating point number for the imaginary part, and write methods for any operation you want to include (such as addition, etc.; trigonometric functions, exponential function).
Yes, if the discriminant is zero, then there will be a double root, which will be real.Also, If the discriminant is positive, there will be two distinct real solutions. But if the discriminant is negative, then you will have two complex solutions.
There's no such thing as a "white penny". Cents are made of zinc and plated with copper. You have either a cent ... - that's been plated a second time for use in jewelry or similar. Value, 1 cent. - that's been dipped in acid to remove the plating. Again, 1 cent. - that was accidentally missed during the plating phase. That's a real mint error and is worth $75 or so, but you'd need to have the coin evaluated in person by a dealer or appraiser who is familiar with error coins.
The first real person to be on a circulating coin was A. Lincoln in 1909.
If your asking about 1963 Double Headed Lincoln cents? No authentic mint errors exist.
Have it checked by a coin dealer.
No reason they shouldn't be real. There were over 2 billion minted in Philadelphia that year which will not have a mintmark.
There is no such thing. This was mentioned on a Simpsons episode but does not exist. Then how is this real? http://media.photobucket.com/image/kissing+lincoln+/gomezchr/penny.jpg
Probably nothing - it's not a real penny. Lincoln was born in 1809, so any object showing him sitting on a log, with an "1809" date is, at best, some commemorative trinket.
The Lincoln cent is the first circulating US coin (1909) to have a portrait of a real person and was struck to commemorate the 100th anniversary of Lincolns birth.
According to the US Treasury's web site, the first Lincoln Head penny was introduced August 2, 1909, replacing the Indian Head penny. It was the first coin to feature a real person and a president. It was in production until February 12, 1959 when it was replaced by the Lincoln Memorial Building in honor of President Lincoln's 150th birthday.
The best way to find out if it is real, simply use a magnet. It will cling to the magnet if it is a real steel penny.
A portrait of Abraham Lincoln, the 16th President of the United States, appears on the front of the US 1 cent piece.If you are asking about the Canadian, Australian or New Zealand 1 cent piece or the British penny, the answer is Queen Elizabeth the Second.
The Real Lincoln was created in 2002.
It seems if the penny were real lucky, you wouldn't have to ask.