1.

Resolve `(5)/((x+2)(x+3))` into partical fractions.A. `5((1)/(x+2)+(1)/(x+3))`B. `5((1)/(x+2)-(1)/(x+3))`C. `10((1)/(x+2)-(1)/(x+3))`D. `10((1)/(x+2)+(1)/(x+3))`

Answer» Let `(5)/((x+2)(x+3))=(A)/((x+2))+(B)/((x+3))`
`(5)/((x+2)(x+3))=(A(x+3)+B(x+2))/((x+2)(x+3))`
Consider `A(x+3)+B(x+2)=5`
If `x=-3`, `-B=5impliesB=-5`
If `x=-2`, `A=5`.
`:.(5)/((x+2)(x+3))=(5)/(x+2)-(5)/(x+3)`.


Discussion

No Comment Found

Related InterviewSolutions