16. The number of real solution of the equation (%o)* = -3 + x - x? is 1) 2 20 3)1 43

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( left(frac{9}{10}right)^{x} ) is alusays prositive. ( begin{aligned}-x^{2}+x-3 &=-left(x^{2}-x+3right)=-left((x-1 / 2)^{2}+11 / 4right) & text { is always negative } end{aligned} ) ( therefore quad ) O Solutions

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