If a + b + c = 2, $$\frac{1}{a} + \frac{1}{b} + \frac{1}{c}$$ = 0, ac = $$\frac{4}{b}$$ and a3 + b3 + c3 = 28, find the value of a2 + b2 + c2.
A. 6
B. 12
C. 10
D. 8
Answer: Option D
Solution(By Examveda Team)
$$\eqalign{ & a + b + c = 2 \cr & ab + bc + ca = 0 \cr & abc = 4 \cr & {a^3} + {b^3} + {c^3} - 3abc = \left( {a + b + c} \right)\left[ {\left( {{a^2} + {b^2} + {c^2}} \right) - \left( {ab + bc + ca} \right)} \right] \cr & 28 - 3 \times 4 = 2\left( {{a^2} + {b^2} + {c^2}} \right) \cr & {a^2} + {b^2} + {c^2} = 8 \cr} $$Related Questions on Algebra
If $$p \times q = p + q + \frac{p}{q}{\text{,}}$$ then the value of 8 × 2 is?
A. 6
B. 10
C. 14
D. 16
A. $$1 + \frac{1}{{x + 4}}$$
B. x + 4
C. $$\frac{1}{x}$$
D. $$\frac{{x + 4}}{x}$$
A. $$\frac{{20}}{{27}}$$
B. $$\frac{{27}}{{20}}$$
C. $$\frac{6}{8}$$
D. $$\frac{8}{6}$$
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