Revision sem1 q8

Find the solution:

x - 1 = 13 + 1(2 + 1(3 + 1(2 + .....)to ∞))

7 Answers

337
Sayan Sinha ·

Oh yes! Plus minus of course!!!

337
Sayan Sinha ·

Is it √52 ?

337
Sayan Sinha ·

Sorry, is it √53 ...?

206
Sayantan Hazra ·

show the steps how you have attempted the question.....
Hint: It is from Quadratic eqns

337
Sayan Sinha ·

Actually the structure of the question is not clear...

x-1=13+12+13...∞
→ 3+12+13+...= 1x-1
→ 3+12+x-1 = 1x-1
→ 3+1x+1=1x-1
→ 3=1x-1-1x+1
→ 3=x+1-x+1(x+1)(x-1)
→ 3=2x2-1
→ 3x2-3=2
→ 3x2=5
→ x2=53
→ x=√53

Thanx...

206
Sayantan Hazra ·

Only √53??

Nothing else before that???

101
Sukrit Roy Chowdhury ·

plus minus root 5/3

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