Question
Solve the inequality
x∈(−∞,0)∪(22,+∞)
Evaluate
2x4>22x×1
Reduce the fraction
More Steps

Evaluate
22x×1
Any expression multiplied by 1 remains the same
22x
Reduce the fraction
x
2x4>x
Separate the inequality into 2 possible cases
2x4>x,x≥02x4>x,x<0
Solve the inequality
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Solve the inequality
2x4>x
Square both sides of the inequality
2x4>x2
Move the expression to the left side
2x4−x2>0
Factor the expression
x2(2x2−1)>0
Separate the inequality into 2 possible cases
{x2>02x2−1>0{x2<02x2−1<0
Solve the inequality
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Evaluate
x2>0
Since the left-hand side is always positive or 0,and the right-hand side is always 0,the statement is true for any value of x,except when x2=0
x2=0
The only way a power can be 0 is when the base equals 0
x=0
Exclude the impossible values of x
x=0
{x=02x2−1>0{x2<02x2−1<0
Solve the inequality
More Steps

Evaluate
2x2−1>0
Move the constant to the right side
2x2>1
Divide both sides
22x2>21
Divide the numbers
x2>21
Take the 2-th root on both sides of the inequality
x2>21
Calculate
∣x∣>22
Separate the inequality into 2 possible cases
x>22x<−22
Find the union
x∈(−∞,−22)∪(22,+∞)
{x=0x∈(−∞,−22)∪(22,+∞){x2<02x2−1<0
Since the left-hand side is always positive or 0,and the right-hand side is always 0,the statement is false for any value of x
{x=0x∈(−∞,−22)∪(22,+∞){x∈/R2x2−1<0
Solve the inequality
More Steps

Evaluate
2x2−1<0
Move the constant to the right side
2x2<1
Divide both sides
22x2<21
Divide the numbers
x2<21
Take the 2-th root on both sides of the inequality
x2<21
Calculate
∣x∣<22
Separate the inequality into 2 possible cases
{x<22x>−22
Find the intersection
−22<x<22
{x=0x∈(−∞,−22)∪(22,+∞){x∈/R−22<x<22
Find the intersection
x∈(−∞,−22)∪(22,+∞){x∈/R−22<x<22
Find the intersection
x∈(−∞,−22)∪(22,+∞)x∈/R
Find the union
x∈(−∞,−22)∪(22,+∞)
x∈(−∞,−22)∪(22,+∞),x≥02x4>x,x<0
Since the left-hand side is always positive or 0,and the right-hand side is always negative,the statement is true for any value of x
x∈(−∞,−22)∪(22,+∞),x≥0x∈R,x<0
Find the intersection
x>22x∈R,x<0
Find the intersection
x>22x<0
Solution
x∈(−∞,0)∪(22,+∞)
Show Solution
