find the sum of the following series: 1+2+3+.....+45
Answers
Answered by
3
Hola Friend ✋✋✋
a = 1
d = 1
an = 45
n = ?
sum = ?
45 = 1 + n -1
n = 45
sum = n/ 2 × ( a + an )
sum = 45/2 × ( 45 + 1 )
= 1035...
Hope it helps
a = 1
d = 1
an = 45
n = ?
sum = ?
45 = 1 + n -1
n = 45
sum = n/ 2 × ( a + an )
sum = 45/2 × ( 45 + 1 )
= 1035...
Hope it helps
Answered by
1
s=n/2(2a+(n-1)d)
=45/2*2(1)+(45-1)*1
=45/2*46
=1035
hope it helps
=45/2*2(1)+(45-1)*1
=45/2*46
=1035
hope it helps
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