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Show that the curve y =f(x) has exactly two turning points, where f(x)= x^3 - 3x^2 - 24x - 28

This question is about turning points of a curve, these occur when the gradient of a line is zero. In its current form, the equation of the curve tells us nothing about the gradient of the curve; it must be ...
JA
Answered by Joshua A. • Maths tutor
5787 Views

Provide one reason why a business may decide to create a sales forecast.

One reason a business may decide to create a sales forecast is the fact that it can help a bank decide whether it should lend money to a business. Many banks and lenders like to see evidence or at least an e...
AA
2023 Views

Issy goes to buy some fruit. She has been told by one friend that 2 apples and 3 bananas costs £3.80. She has been told by another friend that 5 apples and a banana costs £3.65. what are the individual costs of an apple and a banana?

To solve this we form two simultaneous equations. To make things easier lets denote apples as A and bananas as B. So this means we can write the above information in two equations like so: EQ1) 2A + 3B = 380...
KH
Answered by Kieren H. • Maths tutor
5164 Views

Whats the effective resistance in a parallel and series circuit with a cell and two 12 ohms resistors ?

What do we know about parallel circuits- Total current is equal to sum of the current in the individual branches I T = I 1 + I 2 Component of each branch of a circuit share the same voltage as the cell V 1 =...
SS
Answered by Suwanja S. • Physics tutor
3626 Views

What is close reading, and where do I start?

Close reading is really all about noticing things- noticing how the poem has been put together, and the specific choices the poet has made which have led to the finished piece. When you read a poem, your fir...
AP
4949 Views