Without adding find the sum 1 +3+5+7+.........................+47+49

asked Sep 22, 2024 24.2k views

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Answer:

Hi,

Explanation:

Find the sum 1 +3+5+7+.........................+47+49.

$Number\ of\ terms\ in\ this\ sum\ =(49-1)/(3-1)+1 =(48)/(2)+1=24+1=25 \\\\\\1+49=50\\\\1+2+3+4+...+49=(25*50)/(2) =25^2=\boxed{625}\\$

Jacksta answered Sep 26, 2024

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