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The given linear polynomial y = f(x) has(a) 2 zeros(b) 1 zero and the zero is ‘3’(c) 1 zero and the zero is ‘4’(d) No zero1

Question

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Solution

To determine the characteristics of the linear polynomial y=f(x) y = f(x) , we need to understand that a linear polynomial generally takes the form:

f(x)=ax+b f(x) = ax + b

where a a and b b are constants and a0 a \neq 0 . The number of zeros (or roots) of a polynomial is the number of times the polynomial equals zero, i.e., solving f(x)=0 f(x) = 0 .

Analysis of Each Option

  1. (a) 2 zeros

    • A linear polynomial can only have a maximum of 1 zero because it is represented by a straight line which can intersect the x-axis at most once.
  2. (b) 1 zero and the zero is ‘3’

    • This scenario is valid. For the polynomial to have a zero at x=3 x = 3 : f(3)=a(3)+b=0b=3a f(3) = a(3) + b = 0 \Rightarrow b = -3a
    • Thus, there exists a linear polynomial with a zero at x=3 x = 3 .
  3. (c) 1 zero and the zero is ‘4’

    • Similar to option (b), this is also valid. For the polynomial to have a zero at x=4 x = 4 : f(4)=a(4)+b=0b=4a f(4) = a(4) + b = 0 \Rightarrow b = -4a
    • Therefore, this also represents a valid linear polynomial.
  4. (d) No zero

    • A linear polynomial will have no zeros only if b0 b \neq 0 and the linear expression does not cross the x-axis. However, this is not possible unless f(x) f(x) is a constant function, but that does not fit the definition of a linear polynomial.

Conclusion

Based on this analysis:

  • Options (a) is incorrect.
  • Options (b) and (c) are correct possible scenarios for a linear polynomial.
  • Option (d) is incorrect.

Final Answer

The linear polynomial y=f(x) y = f(x) can have:

  • (b) 1 zero at x=3 x = 3
  • (c) 1 zero at x=4 x = 4

Thus, options (b) and (c) are valid possibilities for the zeros of the polynomial.

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