Write a recursive definition for the sequence 21,16,11,6

Which expression is rational? 6. , square root two, square root 14, square root 49

Select the correct answer from each drop-down menu. consider the following polynomials equations. 3x^2(x-1) and -3x^3+ 4x^2-2x+1 perform each operation and determine if the result is a polynomial. is the result of a + b a polynomial? yes or no is the result of a - b a polynomial? yes or no is the result of a · b a polynomial? yes or no

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)