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OpenStudy (itiaax):
Series help. *quesiton below* will give medal
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OpenStudy (itiaax):
Can someone walk me through how to do this, please? I am completely lost as to how to go about this question
OpenStudy (perl):
sum 1..100 - sum 7,17, 27,37,47,57,67,77,87,97
OpenStudy (itiaax):
Alrighty..let me work on it :)
OpenStudy (perl):
we can simplify this a bit , using sum notation
OpenStudy (itiaax):
I've ended up with 4530 as my answer @perl
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OpenStudy (perl):
the sum of the first n integers from 1 to 100 is 100 * 101/2
OpenStudy (itiaax):
WHich is 5050
OpenStudy (perl):
right
OpenStudy (itiaax):
And for for sum of numbers that include the digit 7, I ended up with 520. Then I subtracte 520 from 5050
OpenStudy (perl):
correct
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OpenStudy (perl):
5050 - 520
OpenStudy (itiaax):
4530
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