Math, asked by chandhutchandhuchand, 10 months ago

find the sum of all integers between 10and50 which leave remainder 2 when divided by 3

Answers

Answered by revathijaya18

2

Answer:

n=14

Sn=427

Explanation:

11,14,17,20.......50

a=11,d=3,tn=50

tn=a+(n-1)d

50-11=(n-1)3

39/3=n-1

13+1=n

n=14

Sn=n/2[2a+(n-1)d]

Sn=14/2[22+13*3]

=7(22+39)

=7(61)

Sn=427

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