∣ x − 3 ∣ 3 x 2 − 1 0 x + 3 = 1
Find three times the product of the real values of x that satisfy the equation above.
Note : 0 0 is not defined.
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note that any e i z + 3 satisfies this for real z. the question must mention real x!
I missed 3 1
Oh I multiply each root by 3
Comprehensive solution.
At first we need ∣ x − 3 ∣ = 1 and is easy to see that two of the solutions are 2 and 4 . Now we don't want the expression to become 0 0 so we look for y such that ∣ y − 3 ∣ = 0 , so y = 3 , we evaluate in the exponent 3 ⋅ 3 2 − 1 0 ⋅ 3 + 3 = 0 . So 3 is solution of the exponent and x = 3 . As the product of solutions of the exponent is 3 3 = 1 and one of the solutions is 3 , the other is 3 1 . So 3 × 3 2 ⋅ 4 = 2 ⋅ 4 = 8 . An easier way to do it by only mind, I think. Great problem!
The expression can be equal to 1 if and only if ∣ x − 3 ∣ = 1 or 3 x 2 − 1 0 x + 3 = 0 and ∣ x − 3 ∣ = 0 .
∣ x − 3 ∣ = 1 for x = 4 and x = 2 .
By factoring 3 x 2 − 1 0 x + 3 = 0 , we find that 3 ( x − 3 1 ) ( x − 3 ) = 0 , therefore our possible solutions are x = 3 1 and x = 3 . However, the latter solution does not satisfy the condition ∣ x − 3 ∣ = 0 , therefore our values of x are 4, 2, and 3 1 .
( 4 × 2 × 3 1 ) × 3 = 8
Suppose x = 3 solves the equation. Raise both sides to the power x − 3 1 to obtain : ∣ x − 3 ∣ 3 x − 1 = 1 . Now, if x = 3 1 , we see that the equation is satisfied. So, this is one solution. Assume, now that x = 3 1 . By a similar process as before, we can raise to the appropriate power to get ∣ x − 3 ∣ = 1 , which is found to have solutions : 2 and 4. We can then easily check that these solutions satisfy our equation.
Thus, collecting everything together, we have 3 solutions : 3 1 , 2 , 4 . Hence the answer is 8, as required.
We got three values of x say 2 , 4 3 1 Simply multiply them 3 ( 2 × 4 × 3 1 ) which is 8
lol very easy i dont know who rated it as level 4!!!!!!!!. i am of level 2 in algebra THE SOLUTION FOR THIS PROBLEM IS
ROOTS OF THE EQUATION 3X2-1OX+3=0 are 0.33333..... and 3.SO IF THE POWER IS 0 THEN RESULTANT GIVES 1.BUT,0 POWER 0 IS NOT DEFINED SO 3 DOESNT SATISFY. BUT IF THE BASE IS 1 WHAT EVER MAY BE THE POWER RESULTANT WILL BE 1. SO WE HAVE TWO CASES, 1 IS X=4. CASE 2 IS X= 2 SO ANS IS 3 x 2 x 4 x 0.333333....=4 x 2 x 1=8
Different things are easier or harder for different people. There are some level five problems which I have no problem solving and others where I don't even know how to start.
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case 1 : 3 x 2 − 1 0 x + 3 = 0 where ∣ x − 3 ∣ = 0 .
⟹ x = 2 × 3 1 0 ± 1 0 0 − 3 6 ⟹ x = 6 1 0 ± 8 ⟹ x = 6 1 8 , 6 2 = 3 , 3 1 .
But ∣ x − 3 ∣ = 0 when x = 3 ∴ x = 3 1 .
case 2 : ∣ x − 3 ∣ = 1 where 3 x 2 − 1 0 x + 3 is any number.
∣ x − 3 ∣ = 1 ⟹ x − 3 = ± 1 ⟹ x = 2 , 4 ∴ x = 2 , 4 .
case 3 : ∣ x − 3 ∣ = − 1 where 3 x 2 − 1 0 x + 3 is an even number.
But ∣ A ∣ ≥ 0 ⟹ ∣ x − 3 ∣ = − 1 .
∴ x = 3 1 , 2 , 4
∴ 3 × 3 1 × 2 × 4 = 8 .