08/07/20 17:26:19
>>311
> 110INPUT N, A, D
# 110 INPUT N, A, D
> 120 S=N{2A+(N-1)*D}/2
# S=N*(2*A+(N-1)*D)/2
08/07/20 17:26:19
>>311
> 110INPUT N, A, D
# 110 INPUT N, A, D
> 120 S=N{2A+(N-1)*D}/2
# S=N*(2*A+(N-1)*D)/2
08/07/20 17:26:19
>>311
> 110INPUT N, A, D
# 110 INPUT N, A, D
> 120 S=N{2A+(N-1)*D}/2
# S=N*(2*A+(N-1)*D)/2