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25+28+31......100

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25+28+31......100

Posted by Tarun Thakur 3 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Chanchal Tanwar 3 years, 7 months ago

a=25 ,d=28-25=3,an=100 an=a+(n-1)d 100=25+(n-1)3 100=25+3n-3 100=25-3+3n 100=22+3n 100-22=3n 78=3n n=78/3 n=26 answer

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CBSE > Class 10 > Mathematics