(a) Given: a ÷ (b + c) ≠ (a ÷ b) + (a ÷ c)
a = 12, b = -4, c = 2
Putting the given values in L.H.S. = 12 ÷ (-4 + 2) = 12 ÷ (-2) = 12 ÷ (\(-\frac{1}{2}\)) = \(-\frac{12}{2}\) = -6
Putting the given values in R.H.S. = [12 ÷ (-4)] + (12 ÷ 2) = (12 × \(-\frac{1}{4}\)) + 6 = -3 + 6 = 3
Since L.H.S. ≠ R.H.S.
Hence, verified.
(b) Given: a ÷ (b + c) ≠ (a ÷ b) + (a ÷ c)
a = - 10, b = 1, c = 1
Putting the given values in L.H.S. = -10 ÷ (1 + 1) = - 10 ÷ (2) = -5
Putting the given values in R.H.S. = [-10 ÷ 1] + (-10 ÷ 1) = -10 - 10 = -20
Since, L.H.S. ≠ R.H.S.
Hence, verified.
Match the items given in Column I with one or more items of Column II.
Column I | Column II |
(a) A plane mirror | (i) Used as a magnifying glass. |
(b) A convex mirror | (ii) Can form image of objects spread over a large area. |
(c) A convex lens | (iii) Used by dentists to see enlarged image of teeth. |
(d) A concave mirror | (iv) The image is always inverted and magnified. |
(e) A concave lens | (v) The image is erect and of the same size as the object. |
- | (vi) The image is erect and smaller in size than the object. |