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Let R1 and R2 are the remainders when th...

Let `R_1` and `R_2` are the remainders when the polynomials `x^3+2x^2-5a x-7` and `x^3+a x^2-12 x+6` are divided by `x+1` and `x-2` respecti-vely. If `2R_1+R_2=6,` find the value of `adot`

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The correct Answer is:
a=2
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