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If t=(4)/(5)+(4.6)/(5.10)+(4.6.8)/(5.10....

If `t=(4)/(5)+(4.6)/(5.10)+(4.6.8)/(5.10.15)+………oo` then prove that `9t=16.`

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If [t=(4)/(5)+(4.6)/(5.10)+(4.6.8)/(5.10.15)+....oo], then the value of 9t= .....

If t = 1 - 1/8 + (1.3)/(8.16) -(1.3.5)/(8.16.24) + …… then prove that 5t^2 = 4

If t = 1 - 1/8 + (1.3)/(8.16) -(1.3.5)/(8.16.24) + …… then prove that 5t^2 = 4

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

Show that (4.6)/(5.10) + (4.6.8)/(5.10.15) + (4.6.8.10)/(5.10.15.20) + ……. = 44/45

Show that (4.6)/(5.10) + (4.6.8)/(5.10.15) + (4.6.8.10)/(5.10.15.20) + ……. = 44/45

HCF of (4)/(5),(5)/(6),(9)/(10) is

(1)/(2.4)+(1.3)/(2.4.6)+(1.3.5.7)/(2.4.6.8*10)+.........oo is equal to

(1)/(2.4)+(1.3)/(2.4.6)+(1.3.5)/(2.4.6.8)+(1.3.5.7)/(2.4.6.8*10)+....oo is equal to