If y= -3x7+2x3+ x, the derivative of y with respect to x is

= - 21 + 6x² + 1

Step-by-step explanation:

Differentiate each term using the power rule

(a ) = na

Given

y = - 3 + 2x³ + x , then

= (7 × - 3 ) + (3 × 2)x² + (1 × 1 )

    = - 21 + 6x² + 1

since proposition states that a number is greater than 25, if is true then the number must actually be greater than 25.

this implies that all possible options, except 24, can be accepted

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: