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If f(x) = x^2 - x + 7, find f(3)

f (3) = (3) 2 - (3) + 7 = 9 - 3 + 7 = 13
SJ
Answered by Sagar J. • Maths tutor
3927 Views

How do you find the integral of (2+5x)e^3x ?

If we were to expand the brackets for this question we might be able to get to an answer however there is a much simpler way of solving the problem. As this question is made up of two expressions of x multip...
OC
Answered by Olivia C. • Maths tutor
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Can you explain the approach to solving IB maths induction questions?

Proof by maths induction is a type of proof used in mathematical analysis to demonstrate that a certain expression or statement P(n) involving an arbitrary neutral number n is true for all n belonging to N. ...
VB
Answered by Vlad B. • Maths tutor
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Find the equation of the straight line passing through the points (7,5) and (8, 2)

To find the equation of a straight line we need two things, the gradient of the line and a point lying on the line. To find the gradient of this line we use the gradient formula: m = (y 2 -y 1 )/(x 2 -x 1 ) ...
RS
Answered by Rory S. • Maths tutor
7426 Views

Solve the equation: x^2 - 9x + 20 = 0

This is a quadratic equation, and is likely that x can satisfy either of two values. We know these must multiply to form 20 and summate to -9, and thus they are (x-4) and (x-5). Hence, x is either 4 or 5.
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Answered by Pippa M. • Maths tutor
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