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CBSE COMPLEMENTARY MATERIAL-SEQUENCES AND SERIES -SECTION-B(SHORT anwer type )
- Write the n terms of the series(3)/(7.11^(2))+(5)/(8.12^(2))+(7)/(9.13...
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- Find the number of terms in the A.P. 7, 10, 13, .........., 31.
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- In an A.P.,8, 11, 14, .......... find S(n) – S(n – 1)
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- The number of squares that can be formed on a chess board is
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- Find the sum of given terms:- (a)81 + 82 + 83 ............ + 89 + 90
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- Find the sum of given terms:- 251 + 252 + 253 + ............ + 259 + ...
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- If a, b, c are in A.P. then show that 2b = a + c.
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- If a, b, c are in G.P. then show that b^(2 )= a.c.
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- If a, b, c are in G. P., prove that a^2+ b^2, ab + bc, b^2 +c^2 are al...
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