C++i just copy from the formula given. so how to expected this?
C++yes, i'm sure about the exact equation. because the question give like this: a + (a+d) + (a+2d) +...
C++how to solve this problem? error : expected primary-expression before '...' token error : expected...
C++why the system write Total is not declared? but i have int already.
C++oh... ok i try to change it. TQ
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