expand (1+(2/x))^3
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its the formula
(x+y)^3=x^3+3x^2y+3xy^2+y^3
ur x is 1
ur y is (2/x)
(1+(2/x))^3=1^3+3(1)^2(2/x)+3(1)(2/x)^…
1+6/x+12/(x^2)+8/(x^3)
8(x^-3)+12(x^-2)+6(x^-1)+1
(x+y)^3=x^3+3x^2y+3xy^2+y^3
ur x is 1
ur y is (2/x)
(1+(2/x))^3=1^3+3(1)^2(2/x)+3(1)(2/x)^…
1+6/x+12/(x^2)+8/(x^3)
8(x^-3)+12(x^-2)+6(x^-1)+1
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(1+(2/x))^3= 1+ 8/x^3