11+12+13+--------+20
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2
the answer to the given question is 155
sam2o1:
yes
Please explain it
Please explain
hm
11+20=31
since there r 5 such pairs, we multiply it with 5
31×5= 155
nooo bro
add the no from 11 to 20
Answered by
0
a=11
an=20
No. Of terms= 10
Sum= (10/2)(11+20)
=5*31
=155
an=20
No. Of terms= 10
Sum= (10/2)(11+20)
=5*31
=155
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