Question

Please solve the question​

Answer 1

Answer:

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Step-by-step explanation:

here, a=1

d=3-1=2

an=x

sn=22

an= a+ n-1 ×d

x=1+(n-1)×2

x-1=2n-2

x-1+2=2n

n=x+1

2

sn=n/2(a+l)

225=x+1 (1×x)

2

2

450=x+1 (x×1)

2

450=(x+1)2 (here 2 is power ok samaj jana )

2

√900 = (x+1)

30=x+1

x=29