MCQ
જો ${A^2} - A + I = 0$, તો ${A^{ - 1}}$=
- A${A^{ - 2}}$
- B$A + I$
- ✓$I - A$
- D$A - I$
==> $I = A - {A^2} \Rightarrow $ $I = A(I - A)$
==> ${A^{ - 1}}I = {A^{ - 1}}(A(I - A))$ $ \Rightarrow $ ${A^{ - 1}} = I - A$.
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વિધાન $1$:કોઇક $c\; \in R$ માટે, $f\left( c \right) = \frac{1}{3}$
વિધાન $2$:$0 < f\left( x \right) < \frac{1}{{2\sqrt 2 }}\;,\forall x\; \in R$