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The equation 
2^(c)*b^(c)=10^(c) is true for all values of 
c. What is the value of 
b ?

The equation 2cbc=10c 2^{c} \cdot b^{c}=10^{c} is true for all values of c c . What is the value of b b ?

Full solution

Q. The equation 2cbc=10c 2^{c} \cdot b^{c}=10^{c} is true for all values of c c . What is the value of b b ?
  1. Given Equation Simplification: We are given the equation 2cbc=10c2^{c}\cdot b^{c}=10^{c}. We need to find the value of bb that makes this equation true for all values of cc.
  2. Expressing 1010 as 2×52\times5: First, we can simplify the equation by using the property of exponents that states (a×b)c=ac×bc(a\times b)^c = a^c \times b^c. We apply this property to the right side of the equation where 1010 can be expressed as 2×52\times5. So, we rewrite 10c10^{c} as (2×5)c(2\times5)^{c}, which is equal to 2c×5c2^{c}\times5^{c}.
  3. Equating Bases with Same Exponent: Now we have 2cbc=2c5c2^{c}\cdot b^{c} = 2^{c}\cdot 5^{c}. Since the equation must hold for all values of cc, we can equate the bases with the same exponent cc. This gives us bc=5cb^{c} = 5^{c}.
  4. Concluding Value of B: Since bc=5cb^{c} = 5^{c} for all cc, we can conclude that bb must be equal to 55, because if bb were not equal to 55, there would exist some value of cc for which bcb^{c} would not equal 5c5^{c}.

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