What is the digit in the unit place of the sum 2+2raised to 2+ 2 raised to 3 + 2 raised to 4 + ... + 2 raised to 32?
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Answer:0
Step-by-step explanation:
Last digits of powers of two are 2, 4, 6, 8, 2, 4, 6, 8, ------
So last digit of 2¹+2²+....+2³²= last digit of 2+4+6+8+2+4+....
=last digit of 8(2+4+6+8)
=last digit of 8x20
=0
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