Web#cbsesamplepaper #class10 #term2 #math #question 1 WebConsider an arithmetic progression (AP) whose first term is a 1 (or) a and the common difference is d.. The sum of first n terms of an arithmetic progression when the n th term is NOT known is S n = (n/2) [2a + (n - 1) d]; The sum of first n terms of an arithmetic progression when the n th term(a n) is known is S n = n/2[a 1 + a n]; Example: Mr. Kevin …
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Web26 Apr 2013 AP If five times the fifth term of an AP is equal to 8 times the 8th term, value of 13th term is... OPtion 1) -2 2) -1 3) 0 4) 2 5) 5 6) 10 7) 12 8) 15 9) 17 10) None of these … WebExample 7.4: The common difference of an AP is 5 and 10th term is 43. Find its first term. Solution: We have: t 10 = a + (10 1) d So, 43 = a + 9 × 5 [Since d = 5] or 43 = a + 45 Hence, a = 2 Therefore, first term is 2. Example 7.5: The first term of an AP is 2 and 11th term is 18. Find its 15th term. kinect 360 windows 10 webcam
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WebMay 24, 2024 · In a certain AP, 5 times the 5th term is equal to 8 times the 8th term, its 13th term is About Press Copyright Contact us Creators Advertise Developers Terms Privacy … WebMay 2, 2024 · To find: 8th term Solution: Step 1: Simplify eq.1 by using the formula , nth term , : Step 2: Simplify eq.2 by using the formula , nth term , : Step 3: Multiply eq. (3) by 2 and (4) by 5 and find a: Step 4: Substitute this value of a in eq. (5) we get Step 5: Find the 8th term by using the formula , nth term ,: Hence the 8th term is 33. WebDec 28, 2024 · All you have to do is to add the first and last term of the sequence and multiply that sum by the number of pairs (i.e., by n/2). Mathematically, this is written as: S = n/2 × (a₁ + a) Substituting the arithmetic sequence equation for nᵗʰ term: S = n/2 × [a₁ + a₁ + (n-1)d] After simplification: S = n/2 × [2a₁ + (n-1)d] kinect 360 scanner for thermal recognition