Question 139

If $$x = 5.51, y = 5.52$$ and $$z = 5.57$$, then what is the value of $$x^3 + y^3 + z^3 - 3xyz$$?

Solution

Given that $$x = 5.51, y = 5.52$$ and $$z = 5.57$$

then the value of $$x^3 + y^3 + z^3 - 3xyz$$

$$ x^3 + y^3 + z^3 - 3 xyz$$

put the value $$x=5.51, y = 5.52, z= 5.57 $$

$$ (5.51)^3 + (5.52)^3 + (5.57)^3 - 3 \times 5.51 \times 5.52 \times 5.57$$

$$\Rightarrow 167.28415 + 168.19661 + 172.80869 - 508.23799 $$

$$\Rightarrow 508.28945-508.23799$$

$$\Rightarrow 0.05146 $$ Ans

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