A spherical mirror produces an image of magnification -1 on a screen placed at a distance of 50 cm
from the mirror.
(a) Write the type of mirror.
(b) Find the distance of the image from the object.
(c) What is the focal length of the mirror?
(d) Draw the ray diagram to show the image formation in this case.
please don't spem...
Answers
Answered by
1
Answer:
a) it is concave mirror.
b) -50
c) -25
Answered by
3
Answer:
Solution :-
Simply the given equation:
\begin{gathered} \sf \to \: (x - 2) {}^{3} = x {}^{3} - 4x {}^{2} + x + 1 \\ \sf\to \: x {}^{3} - 6x {}^{2} + 12x - 8 = x {}^{3} - 4x {}^{2} + x + 1 \\ \sf \to \: - 6x {}^{2} + 4x {}^{2} + 12x - x - 8 -1 = 0 \\ \sf \to \: \green{\bf{- 2x {}^{2} + 11x - 9 = 0}}\end{gathered}
→(x−2)
3
=x
3
−4x
2
+x+1
→x
3
−6x
2
+12x−8=x
3
−4x
2
+x+1
→−6x
2
+4x
2
+12x−x−8−1=0
→−2x
2
+11x−9=0
∴ The following equation is in the form of ax²+bx-c =0, so it's a quadratic equation.
Used identity:
(a-b)³ = (a-b)³=a³-3a²b+3ab²-b³
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