Math, asked by gaurav35763, 9 months ago

find s9 if t1=15 , t9=135

Answers

Answered by Anonymous

0

Step-by-step explanation:

a=15

a+8d=135

d=15

S9=9/2(2)(a+4d)=75×9=605

Answered by Anonymous

30

Answer:

hlo buddy

Step-by-step explanation:

t=15

t+8d=135

d=15

=Sn=n/2(2+(n-1)d)

S9=9/2(2)(a+4d)

=75*9

=605

Tata

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