Customer account “numbers” for a certain company consists of 2 letters followed by 2 single-digit numbers. How many different ac
1 answer:
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Answer:
(a)
Step-by-step explanation:
The tangent and the normal at point P are perpendicular.
Given
= 3, then
Given the gradient m of the tangent then the gradient of a line perpendicular to it is
= -
= -
→ (a)