2017年10月9日 · Domain: all real numbers x such that x != 7 Range: all real numbers. The domain is the set of all values of x such that the function is defined. For this function, that's every value of x, with the exception of exactly 7, since that would lead to a division by zero. The range is the set of all values y that can be produced by the function. In this case, it's the set of all real …

2017年2月19日 · How do you solve #(x+1)(x-7)<=0# using a sign chart? Precalculus Solving Rational Inequalities Polynomial Inequalities. 1 Answer

2015年9月1日 · [-7,7] There are two possibilities: Either x is greater than 0, in which case x <= 7 Or, x is less than 0, in which case x >= -7 (because in order for the absolute value of x to be less than 7, x must be greater than -7.) So, x has to be less than or equal to 7, and x has to be greater than -7. So, the solution set will be "from -7 to 7, inclusive". This can be written like this: [-7, 7]

2018年3月8日 · x = 7/2+-3/2sqrt(5) Given: x+1/x=7 Multiply both sides by x to get: x^2+1 = 7x Subtract 7x from both sides ...

2018年1月22日 · x=-2.90 or 6.90 First, solve the quadratic on the bottom of the fraction (denominator) on the left side: 3/(x^2-10x+21) 3/((x-3)(x-7)) Now we move to the right side and add the two fractions together by multiplying the two denominators together.

2017年4月12日 · x inRR,x!=7 y inRR,y!=0 "let " y=1/(x-7) The denominator of y cannot equal zero as tis would make y undefined. Equating the denominator to zero and solving gives the value that x cannot be. "solve " x-7=0rArrx=7larrcolor(red)" excluded value" rArr" domain is " x inRR,x!=7 "Rearrange the function to make x the subject" rArry(x-7)=1 rArrxy-7y=1 rArrxy=1+7y …

2016年11月12日 · The vertical asymptote is x=7 The horizontal asymptote is y=0 There are no oblique asymptotes. The intercepts are (0,20/7) and (20/3,0) As you cannot divide by 0, a vertical asymptote is x=7 lim_(x->-oo)y=lim_(x->-oo)1/x=0^(-) lim_(x->+oo)y=lim_(x->+oo)1/x=0^(+) Therefore y=0 is a horizontal asymptote. lim_(x->7^-)y=-oo lim_(x->7^+)y=+oo There are no …

2018年5月4日 · How do you find the derivative of #y=1/x^7? Calculus Basic Differentiation Rules Power Rule. 1 Answer

2018年1月28日 · Equating the denominator to zero and solving gives the value that x cannot be. #"solve "x-7=0rArrx=7larrcolor(red)"excluded value"# #rArr"domain is "x inRR,x!=7#

2016年2月26日 · How do you factor the trinomial #x² - 6x - 7#? Algebra Polynomials and Factoring Factorization of Quadratic Expressions. 2 Answers