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" Q."74quad 1-(1)/(5)+(1.4)/(5.10)-(1.4....

" Q."74quad 1-(1)/(5)+(1.4)/(5.10)-(1.4.7)/(5.10.15)+....

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1-(1)/(5)+(1.4)/(5.10) - (1.5.7)/(5.10.15)+…..=

1-(1)/(5)+(1.4)/(5.10) - (1.5.7)/(5.10.15)+…..=

1- (1) / (5) + (1.4) / (5.10) - (1.4.7) / (5.10.15) + ... oo =

(1.4)/(5.10)-(1.4.7)/(5.10.15)+(1.4.7.10)/(5.10.15.20)+….=

Find the sum of the infinite series 1-(4)/(5)+(4.7)/(5.10)-(4.7.10)/(5.10.15)+………

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.

5(1)/(7)-{3(3)/(10)-:(2(4)/(5)-(7)/(10))}

Subtract (7)/(10) from 4(1)/(5)