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 …
In a certain A.P. 5 times the 5 th term is equal to 8 times …
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. Webif the five times the fifth term of an AP is equals to 8 time it's eight term.show that the 13th term is zero Question if the five times the fifth term of an AP is equals to 8 time it's eight term.show that the 13th term is zero Expert Solution Want to see the full answer? Check out a sample Q&A here See Solution star_border poly vs steel yard roller
In a certain AP, 5 times the 5 th term is equal to 8 times the 8th ...
WebIn the fourth term, you subtract six three times. So whatever term you're looking at, you subtract six one less than that many times. Let me write this down just so, notice when … 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] WebNov 11, 2024 · Secondary School The 2nd term of an ap is nine times the 5th term and the sum of the first eight terms is 56. find the first term and the common difference. See answers Advertisement infinte Answer: First mark me brainlist and follow me Step-by-step explanation: a2=9a5 a+d=9(a+4d) a+d=9a+36d 8a+35d______(I) S8=8/2(2a+(8-1)d) … polyv teacher