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The sum of Arithmetic progression 4+12+20+.....+100 is ​

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The sum of Arithmetic progression 4+12+20+.....+100 is ​676

Step-by-step EXPLANATION:

Q) The sum of Arithmetic progression 4+12+20+.....+100 is ​

⇒  given, arithmetic progression is 4,12,20,.....,100

the arithmetic NTH term is obtained by adding 8 in (n-1)TH term

∴ the arithmetic progression is 4,12,20,28,36,44,52,60,68,76,84,92,100

The sum of Arithmetic progression 4+12+20+.....+100 is -

∴ 4+12+20+.....+100 = 4+12+20+28+36+44+52+60+68+76+84+92+100

∴ 4+12+20+.....+100 = 676



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