The sum of first m terms of an A.P. is 4m² – m. If its nth term is 107, find the value of n. Also, find the 21 st term of this A.P.
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If the sum of first p, q and r terms of an A.P. are a, b and c respectively, prove that
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More Solutions:
- The image of a point P under reflection in the x-axis is (5, -2).
- The point P (2, 3) is reflected in the line x = 4 to the point P.
- The point P (2, 4) on reflection in the line y = 1.
- The point P ( -4, -5) on reflection in y-axis is mapped on P.
- Find the coordinates of the image of (3, 1) under reflection.
- A Point P (a, b) is reflected in the x-axis to P’ (2, -3).