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Answer is not b please help​

Answer is not b please help​-example-1
User Hatter
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1 Answer

4 votes

Answer:

63

Explanation:

This sum (from n = 1 to n =6 of 128(1/2)^n can be found in several ways. Since there are only a few numbers here to add together, we can just write out the given sum as

128(1/2 + 1/4 + 1/8 + 1/16 + 1/32 + 1/64), or

64 + 32 + 16 + 8 + 4 + 2 + 1, which sums up to 63.

User Yargicx
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