Prove that the multiple of an even number and an odd number is always even.
2n is even, so (2n+1) is odd ; Multiplying even by odd gives: 2n(2n + 1) ; which is a multiple of 2, thus even * odd = even.
OT
Related Maths GCSE answers
All answers ▸Solve x^2 + 7x + 10 = 0
A car costs £300. The price is then reduced by 20%. However, the shop increases the new price by 15%. Fadhila says, "20 - 15 = 5, so the original price of the car has been reduced 5%". Is she right? What is the final price of the car?
How can I know whether to multiply or add probabilities?
Solve the inequality x^2 < -8x + 9