Sol.
Q. 19. The first and the last term of an A.P. are 4 and 81 respectively. If the common difference is 7, how many terms are there in the A.P. and what is their sum?
Sol.
| Mathematics 2008 Question Papers Class X | |||||||
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Set 2 | ||||
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Set 3 | |
Set 3 | ||||
