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1.Relation and Function
normal
વિધેય $f(x) = log|5{x} - 2x|$ નો પ્રદેશ્ગણ $x \in R - A$ હોય તો $n(A)$ = ....... થાય. ( જ્યા $\{.\}$ અપુર્ણાક વિધેય છે )
A
$3$
B
$2$
C
$1$
D
$0$
Solution
$5\{ x\} – 2x = 0\, \Rightarrow \{ x\} = \frac{{2x}}{5}\,;\,[x] = \frac{{3x}}{5}\,\,\,0 \le \frac{{2x}}{5} \le 1 \Rightarrow 0 \le x \le \frac{5}{2}$
Standard 12
Mathematics