in an a.p. the sum of first 41 terms 5125 to find 21st term of the a.p.
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Answered by
2
here your answer ..hope u pasand
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Answered by
1
Step-by-step explanation:
Tn=a+(n−1)d
50=a+(21−1)d
50=a+20d...(1)
S
n
=
2
n
[2a+(n−1)d]
S
41
=
2
41
[2a+(41−1)d]
=
2
41
[2a+40d]
=
2
41
2[a+20d]
=41[a+20d]
From (1)
=41[50]
S
41
=2050
mark brainliest
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