Q. Find the limit as x approaches positive infinity.x→∞lim4x4+5x5x2+4=
Simplifying the expression: To find the limit of the given function as x approaches positive infinity, we need to analyze the behavior of the numerator and the denominator separately. We will start by simplifying the expression by dividing both the numerator and the denominator by the highest power of x in the denominator, which is x2.
Removing terms as x approaches infinity: Divide the numerator and the denominator by x2: x→∞lim4x4/x2+5x/x25x2/x2+4/x2Simplify the expression:x→∞lim4x2+5/x5+4/x2
Simplifying the square root: As x approaches positive infinity, the terms x24 and x5 in the expression will approach zero. Therefore, we can simplify the expression further by removing these terms:x→∞lim(4x2+0)(5+0)This simplifies to:x→∞lim(4x2)5
Final step: approaching zero: Now, we can simplify the square root in the denominator: 4x2=2x (since x is approaching positive infinity, we consider only the positive square root). So the expression becomes: limx→∞2x5
Final step: approaching zero: Now, we can simplify the square root in the denominator: 4x2=2x (since x is approaching positive infinity, we consider only the positive square root). So the expression becomes: limx→∞2x5 As x approaches positive infinity, the term 2x in the denominator will also approach infinity, making the whole fraction approach zero: limx→∞2x5=0
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