END [GIVEAWAY] Can you work out this math question?
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This is an arithmetic sum with a constant subtracted.
Or written in longhand,
Note that there are 101 terms inside the parentheses.
Note also that pairs of terms starting from opposite ends (50 of them) always add up to 100. The middle term, 50, stands alone with no counterpart. Rearranging,
Written another way,
But since
, and the 50s cancel out, this reduces to,
The answer is 5000.
This is a trivial case of the general formula for sums
Where a=0, d=1, and n=101
(minus 50 equals 5000)
Or written in longhand,
Note that there are 101 terms inside the parentheses.
Note also that pairs of terms starting from opposite ends (50 of them) always add up to 100. The middle term, 50, stands alone with no counterpart. Rearranging,
Written another way,
But since
The answer is 5000.
This is a trivial case of the general formula for sums
Where a=0, d=1, and n=101
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The answer to the math question is 5000Do you know how many puffs can one USONICIG ZIP POD last?
Work out the math question to get the answer:
But the right answer is:
'According to lab test, one Ultrasonic Chip can last more than 5000 puffs'
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