if the sum of the nth term of A. p. is 3n/2+5n /2 then find 25th term
Answers
Answered by
1
Step-by-step explanation:
An = 3n/2+5n/2
a25 = 3(25)/2+ 5(25)/2
= 75/2 + 125/2
= (75+125)/2
= 200/2
= 100
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Answered by
0
Answer:100
Step-by-step explanation:
Sn=4n=n/2(2a+(n-1)d
2a+(n-1)d=8........›1
S25=25/2(2a+(n-1)d)
From eq 1
S25=25/2(8)
S25=25×4
S25=100
So s25=100
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