Q. The equation 2c⋅bc=10c is true for all values of c. What is the value of b ?
Given Equation Simplification: We are given the equation 2c⋅bc=10c. We need to find the value of b that makes this equation true for all values of c.
Expressing 10 as 2×5: First, we can simplify the equation by using the property of exponents that states (a×b)c=ac×bc. We apply this property to the right side of the equation where 10 can be expressed as 2×5. So, we rewrite 10c as (2×5)c, which is equal to 2c×5c.
Equating Bases with Same Exponent: Now we have 2c⋅bc=2c⋅5c. Since the equation must hold for all values of c, we can equate the bases with the same exponent c. This gives us bc=5c.
Concluding Value of B: Since bc=5c for all c, we can conclude that b must be equal to 5, because if b were not equal to 5, there would exist some value of c for which bc would not equal 5c.
More problems from Find derivatives using the chain rule I