Consider the following inequalities
πΒ² β 4π < 4
3π + 2π < 6
where π and π are positive integers.
The value of (π + π) is _______.
Correct Answer :
2
Solution :
The correct answer is 2.
As shown in the provided image, we are given two inequalities involving positive integers and :
1) Inequality 1:
2) Inequality 2:
Let's analyze and combine these inequalities step-by-step to find the positive integer values of and .
Step 1: Rearrange Inequality 1
We can isolate the term containing on one side. By adding and subtracting from both sides, we get:
Let this be Inequality (i).
Step 2: Rearrange Inequality 2
To align the terms so they can be eliminated or compared easily with Inequality (i), we can multiply the second inequality by :
Now, isolate the term by subtracting and from both sides:
Let this be Inequality (ii).
Step 3: Combine Inequality (i) and Inequality (ii)
Adding Inequality (i) and Inequality (ii) side-by-side allows us to eliminate the terms:
Step 4: Factor and solve the quadratic inequality for
We can factor the quadratic expression by finding two numbers that multiply to and add to . These numbers are and :
This inequality holds true when the variable lies between the two roots of the quadratic equation:
Since the problem states that must be a positive integer, the only possible value for in the interval is:
Step 5: Solve for
Now we substitute back into our inequalities to determine the value of .
From Inequality (i):
From Inequality (ii) or directly from the original Inequality 2:
Combining these bounds for gives:
Since is also a positive integer, the only integer in this interval is:
Step 6: Calculate
Using our values and :
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