If f(x)=3x5−10x3+5, on what intervals is f″(x)> 0?

enter the (disjoint) interval(s) below using 'u' for union, '"nf" for [infinity], and "-inf" for −[infinity] if necessary.

Step-by-step explanation:

we are given an algebraic function in x, such that

To find when second derivative >0

For this let us find first and second derivative by successive differentiation.

when ii derivative >0 we have

60x^3-30>0

f"(x)>0 in

answer: $201

step-by-step explanation: to get the answer, you first get 3 nieces that he sold and multiply it by 67 and get $201, so he earned $201 selling his nieces.

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have