HEY PLEASE HELP ME IN THIS
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STEP BY STEP...
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THANKU
HOPE THIS WILL HELP YOU
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samruddhipathak:
thanks...
Plz BRAINLIST
ya sure
please
aare let other answer.......how can i mark mark u as Brainliest until there are two answers
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Answer:
21st term= a+ 20 d=25
sum of terms in AP=n/2[2a+(n-1)d]
n=41
sum= 41/2[2a+40d] =41*(a+20d)=41*25=1025
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