Question

Find the limit of the function by using direct substitution. limit as x approaches four of quantity x squared plus three x minus one

Answer 1

The correct answer is 27, when using direct substitution

Explanation:

(4)^2+3(4)-1 --> 16+12-1 --> 16+11= 27

Answer 2

`\lim_(x \to 4) f(x)=x^2+3x-1`
just subsitute
f(4)=4²+3(4)-1
f(4)=16+12-1
f(4)=28-1
f(4)=27

it approaches 27 as x approaches 4