WebIn an AP, if d = - 4 , n = 7 and an = 4, then a is equal to A) 6 B) 7 C) 20 D) 28 Solution I n an AP, an =a+(n−1)d ⇒ 4= a+(7−1)(−4) [by given conditions] ⇒ 4= a+6(−4) ⇒ 4+24= a ∴ a= 28 … WebMar 30, 2024 · In an Arithmetic Progression, if d= –4, n = 7,an = 4, then find a. Get live Maths 1-on-1 Classs - Class 6 to 12 Book 30 minute class for ₹ 499 ₹ 299 Transcript Question 5 …
In an AP, if d = -4 n =7,an = 4 then find a. - Brainly
WebCorrect option is C) As we know nth term, a n=a+(n−1)d & Sum of first n terms, S n= 2n(2a+(n−1)d), where a & d are the first term amd common difference of an AP. Given, a=5,d=3,a n=50 ⇒a+(n−1)d=50 ⇒5+(n−1)3=50 ⇒5+3n−3=50⇒3n=48⇒n=16 ∴S 16= 216[2a+(16−1)d]=8[2×5+15×3]=440 Hence, n=16,S 16=440 Solve any question of … WebThen the nth term, or the general term, is defined as follows: an=a+ (n–1)d Let’s look at how this is accomplished. Let a1, a2, a3,….an be the APs that have been provided. Then, a1=a ⇒a1=a+ (1–1)d…… (i) Given that each term of an AP is obtained by adding a common difference to the term before it, this is a reasonable assumption. As a result, a2=a+d tanda pola srt
In an AP, if d = -4, n = 7, an = 4, then a is ______. - Mathematics ...
WebJul 7, 2024 · Please help with the answer for this question. Thank you. A rule was used to make the pattern shown below. 51, 45, 39, 33, 27, 21 .... Which could be the rule used to make the pattern? (A) Devide by 7 (B) Two positive integers, expressible in the form of a=p q^2r^2 t ,b=p^3 q r find LCM and HCF . -6x=72 find value of x? Webn=7 i.e there are 7 terms in the AP. an=4 i.e nth term of the A.P is 4 We know that an=a+ (n-1)d So 4=4+ (7–1)d =>4–4=6d =>0=6d =>d=0 4 Yashoda Nagar B.tech in Bachelor of Technology in Electronics and Communications Engineering & Science and Mathematics, Rajasthan Technical University (Graduated 2024) 2 y solution:- an = a + (n-1)d then WebLet the first term, common difference and the number of terms of an AP are a, d and n respectively. Given that, first term (a) = – 5 and last term (l) = 45 Sum of the terms of the AP = 120 ⇒ S n = 120 We know that, if last term of an AP is known, then sum of n terms of an AP is, So, the common difference is 10. batam berada di