A) 0
B) 1
C) \[-1\]
D) None of the above
Correct Answer: D
Solution :
\[\cos \,\pi x={{x}^{2}}-x+\frac{5}{4}\] \[={{x}^{2}}-2.x.\frac{1}{2}+\frac{1}{4}-\frac{1}{4}+\frac{5}{4}\] \[={{\left( x-\frac{1}{2} \right)}^{2}}+1>1\] \[-1\,\,\underline{\,<}\,\,\cos \,\,x\,\underline{<}\,\,\,1\]You need to login to perform this action.
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