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" I1.If "x=(1)/(5)+(1.3)/(5.10)+(1.3.5)/...

" I1.If "x=(1)/(5)+(1.3)/(5.10)+(1.3.5)/(5.10.15)+......+6.5then" show that "3x^(2)+6x=2

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If x=(1)/(5)+(1.3)/(5.10)+(1.3.5)/(5.10.15)+….oo then find 3x^(2)+6x.

If x=(1)/(5)+(1.3)/(5.10)+(1.3.5)/(5.10.15)+….oo then find 3x^(2)+6x.

If x=(1)/(3)+(1.3)/(3.6)+(1.3.5)/(3.6.9)+…. , then x^2+2x-2=

(i) 6x^(-2) (ii) (1)/(5)x^(5) (iii) (1)/(3x)

(x-1)/(3)+(2x+5)/(6)=(3x-6)/(9)-(2x-5)/(2)