Question

Is a 21 terms of an ap is 25 find its 41st find the sum 41 times?

Answer 1

Hey mate here is your answer

hope it will help you

Answer 2

               

$\bold{Question:}$

$\sf{If the 21st term of an AP is 25, find the sum of first 41 terms. }$

$\bold{Answer: }$

     

$\bold{1025}$

   

$\bold{Step} - \bold{by} - \bold{step\ explanation: }$

$\sf{Using the formula,} \ \\ \\ S_n=n \times T_{[\frac{n+1}{2}]}$

$S_{41} = 41 \times T_{[\frac{41+1}{2}]} \\ \\ S_{41}=41 \times T_{[\frac{42}{2}]} \\ \\ S_{41} = 41 \times T_{21} \\ \\ S_{41}=41 \times 25 \\ \\ S_{41}=\bold{1025}$

$\sf{Hope this helps. Plz mark it as the brainliest. \\ \\ \\ Thank you. :-))}$