Question

if the sum of the nth term of A. p. is 3n/2+5n /2 then find 25th term​

Answer 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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Answer 2

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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