without adding find the sum 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 + 21 + 23
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Answered by
6
sn=n/2 (2a +(n-1)d)
=6 (2+11×2)
=6×24
=144
=6 (2+11×2)
=6×24
=144
Answered by
4
this forms an A.P. series.
it's first term is a=1 and common difference is d = 2
last term is l = 23
number of terms is n = 12.
so the sum S =n/2(a+l)
=12/2(1+23)
=6*(24)
=144.
hope it's help you pls select me as brainliest.
it's first term is a=1 and common difference is d = 2
last term is l = 23
number of terms is n = 12.
so the sum S =n/2(a+l)
=12/2(1+23)
=6*(24)
=144.
hope it's help you pls select me as brainliest.
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