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7+9+11+12+15+15........ Upto 70 terms find the …

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7+9+11+12+15+15........ Upto 70 terms find the sum of the series

Posted by Anuj Mandelia 6 years, 10 months ago

CBSE > Class 10 > Mathematics

3 answers

Avichal Gogna 6 years, 10 months ago

A=7 , d=2

0Thank You

Manasvi Kakuste 6 years, 10 months ago

a = 7 =d=2 ...n =70 = Sn= n/2(2a +( n-1)d) = S70 = 70÷2(2×7 + ( 70-1)2) = 35(14+138 ) = 35× 152 =2320

1Thank You

Piyush Kamboj?? 6 years, 10 months ago

5320

0Thank You

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CBSE > Class 10 > Mathematics