What are the domain and range of the function f(x)=5^x-3 +1
2 answers:
Answer:
Step-by-step explanation:
Given the function
we have to find the domain and range of the function.
The domain is the set of all possible values of independent variable i.e of x
The range is the complete set of all possible resulting values of the dependent variable i.e of y
Here the above function is defined for every value of R i.e for all value of real numbers.
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Answer:
- there are 4 complex solutions
- 3 real zeros and 2 complex zeros
Step-by-step explanation:
1. Descarte's rule of signs tells you there are 0 positive real roots and 0 or 2 negative real roots. (for positive x, signs are ++++ so have no changes; for negative x, signs are ++-+, so have 2 changes.) A graph shows no real roots.
2. There are 3 sign changes in the given polynomial, so 3 or 1 positive real roots. When the sign of x is changed, there are 2 sign changes, so 0 or 2 negative real roots. A graph shows 2 negative and one positive real root (for a total of 3), so the remaining 2 roots are complex.
