Question

An electric heater is plugged into the mains supply using a fused plug.
The current in the heater is 10A.
The cable attached to the heater is rated at 15A.
The fuses available are rated at 1A, 3A, 5A and 13A.
Which fuse should be used?
A 1 A B 3 A C 5 A D 13 A

Please with an explanation

Answer 1

Answer:

Solution:-

f:N→Y

f(x)=4x2+12x+15

A function is invertible if the function is one-one and onto.

Let x1,x2∈N, such that

f(x1)=f(x2)

4x12+12x1+15=4x22+12x2+15

⇒(x12−x22)+3(x1−x2)=0

⇒(x1−x2)(x1+x2+3)=0

∵x1,x2∈N

⇒x1+x2+3

Answer 2

Answer:

pls see the attachment

Explanation:

hope it help uh freind