1.

dots %2B 1 %2B 9 %2B 9**2 %2B 9**2010

Answer»

The unit digit of nth power of 9 is 9 if n is any odd whole number while it is 1 if n is any even whole number.Let's go on adding unit digits of1 + 9 + 9^2 + 9^3 + .... + 9^2010 So, we get1 + 9 + 1 + 9 +..... + 1 + 9So, it's doubtlessly zero.Ans. = 0

thanks



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