Math, asked by varities7160, 1 year ago

Sum of integers divisible by 7 between 100 and 999

Answers

Answered by AbhijithPrakash
0

Answer:

\underline{\huge{\texttt{128}}}

Step-by-step explanation:

a_n=a+(n-1)d\\d=Common\: difference\\a_n=Last\: term\\n=No.\: Of\: terms\\a=First\: term\\Now\: a=105,d=7,a_n=994\\Therefore,\\994=105+(n-1)7\\We\: get\: n = 128.

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