without adding find the sum 1+3+5+7+...+23
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144 is the sum of this AP
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a1=1 and an=23
n =23
Sum=n(a1+an)/2
=12(1+23)/2
=12(24)/2
=144
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n =23
Sum=n(a1+an)/2
=12(1+23)/2
=12(24)/2
=144
Mark me as brainliest if it helps you!!!!
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