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

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

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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.

3/(5x)-2/(3x)=1/10

(3^((1)/(5)))^(x)+(3^((1)/(10)))^(x-10)=84

If x=1+5^((1)/(3))+5^((2)/(3)) then find the value of x^(3)-3x^(2)-12x+6

If 2[{:(3,4),(5,x):}]+[{:(1,y),(0,1):}]=[{:(7,0),(10,5):}] , then find (x-y) .

If A=[(1,0),(3,-1),(-5,2)] and B=[(1,-2),(-2,2),(1,1)] , then find the matrix 'X' such that 3A + X = 5B.