What is the right choice for question 27) ?
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x-intercept of a graph of function means the point where the graph cuts/meet/intercept the x-axis. When a polynomial intercept the x-axis, at that moment y = 0.
`y = x^4+1`
When y = 0;
`x^4 = -1`
`x^4>=0` always. Therefore no x-intercepts.
This has been shown in the graph below also.
So the graph does not intercept x-axis for real numbers of x. The correct answer is given in a).
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