WebJul 11, 2024 · In an ap if 12th term is -13 and the sum of its first four terms is 24 , find the sum of its first ten terms. ← Prev Question Next Question →. 0 votes. 328 views. asked … WebMar 18, 2024 · selected Mar 24, 2024 by ShasiRaj Best answer Let’s take the first term as a and the common difference to be d Given that, a5 = 30 and a12 = 65 And, we know that an = a + (n – 1)d So, a5 = a + (5 – 1)d 30 = a + 4d a = 30 – 4d …. (i) Similarly, a12 = a + (12 – 1) d 65 = a + 11d a = 65 – 11d …. (ii) Subtracting (i) from (ii), we have
in an AP the sum of first n terms is 3n2/2 + 13n/2 - Toppr
Webnth term of an AP, Tn=a+ (n-1)d T12=17=a+ (12–1)d=a+11d=17——— (1) Sum of n terms of an AP, Sn=n/2 [2a+ (n-1)d] S12=12/2 [2a+ (12–1)d]=105 =>6 [2a+11d]=12a+66d=105——— (2) From the eq.ns (1)& (2) 6a+66d=102 —— (3). {since eq.n (1) *6} 12a+66d=105 ————————— 6a=3=>a=1/2 {solve 2&3 eq.ns } Substitute a value in eq.n (1) … WebThe 5 th term of an AP is 13 and the 1 st term is -3. Find the 6 th term and the sum of the first 12 terms. (4 marks) Given that f(x) = 3 x: Copy and complete the table below for the function f(x) = 3 x. x-2-1. 0. 1. 2. f(x) 1/3. 1 (3 marks) Using a scale of 2cm:1 unit on both axes, draw the graph of f(x) = 3 x for −2≤𝑥≤2 sight and sound coupon
In an A.P., if the 12th term is –13 and the sum of its first four …
WebSolution For In an A.P., if the 12th term is –13 and the sum of its first four terms is 24, find the sum of its first ten terms. ... 23, c are in AP. Topic: Arithmetic Progressions . Exam: … WebApr 5, 2024 · By simplifying it, we get the equation of the form: S 4 = 4 a + 6 d . First condition given in the question is 12th term is -13. Substituting this in equation (1), we get it as: a + 11 d = − 13 ……………… (3) By substituting sum of 4th term as 24, we get it as: 4 a + 6 d = 24 ………………… (4) By substituting 11d on both sides of equation (3), we get: WebThe n th term of an AP can be obtained by a n = a + (n − 1)d; The sum of an AP can be obtained by s n = n/2 [2a + (n − 1) d] The graph of an AP is a straight line with the slope as … sight and sound daniel