Question

for a given G.P if T2 =9 and T5=243 then find S4​

Answer 1

Step-by-step explanation:

t2=ar=9

t5=ar⁴=243

a=9/r

a=243/r⁴

9/r=243/r⁴

r³=27

r=3

a=3

s4=3(3⁴-1) /3-1

=3x80/2

=120

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Answer 2

Answer:

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