(i) \(6 \times 6 \times 6 \times 6 = 64\)
(ii) \(t \times t= t ^2\)
(iii) \(b \times b \times b \times b = b^ 4\)
(iv) \(5 \times 5 \times 7 \times 7 \times 7 = 5^2 \times 7^3\)
(v) \(2 \times 2 \times a \times a = 2^2 \times a ^2\)
(vi) \(a \times a \times a \times c \times c \times c \times c \times d = a^ 3 c ^4 d\)
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. |