Question

The unit place of (1+9+9square+9cube+....+9 power2007

Answer 1

Answer:

0

Step-by-step explanation:

9^0+9^1=10

9^2+9^3=810

hence even power+odd power=0 in units digit.

Since 2007 is odd and 2006 is even the given expression ends with 0.

Answer 2

Answer:

0

Step-by-step explanation:

Hope it helps

Thankyou