In an ap the sum of first n terms is 5n 2/2
WebThe sum of the first n term sofa an AP is ( 3 n 2 2 + 5 n 2). Find its nth term and the 25th term Advertisement Remove all ads Solution Let S denotes the sum of first n terms of the AP. ∴ s n = ( 3 n 2 2 + 5 n 2) ⇒ s n - 1 = 3 ( n - 1) 2 2 + 5 ( n - 1) 2 = 3 ( n 2 - 2 n + 1) 2 + 5 ( n - 1) 2 = 3 n 2 - n - 2 2 ∴ n th term pf the AP , a n WebThe sum of the first n terms of an AP is (5n^2/2 + 3n/2). Find its nth term and the 20th term of this AP. asked Jul 9, 2024 in Arithmetic Progression by Anaswara (31.5k points) …
In an ap the sum of first n terms is 5n 2/2
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WebJul 25, 2024 · Mohammed Owais. 2 years ago. Its bcoz, (Ref=n/2) the sum of any 2 terms of an AP is divided by 2 gets it middle number. example, 3+6/2 is 4.5 which is the middle of these terms and if you … WebOct 16, 2024 · The sum of the first n terms of an A.P. is given by Sn = 2n2 + 5n , find the nth term of the A.P. arithmetic progression class-10 1 Answer +1 vote answered Oct 16, 2024 by Ishti (46.5k points) selected Oct 31, 2024 by Anika01 Best answer Sn =2n2 + 5n Taking n = 1, we get S1 = 2 (1)2 + 5 (1) ⇒ S1 = 2 + 5 ⇒ S1 = 7 ⇒ a1 = 7 Taking n = 2, we get
WebApr 20, 2024 · The sum of the first n term of an AP,denoted by S_n is given by S_n=n^2+8n So n th term of the series will be t_n=S_n-S_(n-1)=n^2+8n-((n-1)^2+8(n-1)) =>t_n=2n-1+8=2n+7 Inserting n=1,2,3.... we get "For "n=1tot_1=2*1+7=9 "For "n=2tot_2=2*2+7=11 "For "n=3tot_3=2*3+7=13 Hence first term t_1=9 and common difference d=t_2-t_1=11-9=2 … Webin an AP the sum of first n terms is 3n2/2 + 13n/2 Solution Verified by Toppr Was this answer helpful? 0 0 Similar questions The first term of two APs are equal and the ratios of …
Web(11) Search the sum the first 20 terms of the numerical series in which 3 rl term is 7 also 7 in term is 2 more than three time its 3 rad term. Solution (12) Stylish an arithmetic series, which sum of first 11 conditions is 44 and one that of the next 11 terms is 55. WebJun 28, 2024 · nth term =10n+3 Step-by-step explanation: sn=d/2 n^2+ (a-d)n 5n^2+3n=d/2n^2+ (a-d)n from the equation d/2=5 d=10 (a-d)=3 a-10=3 a=13 first term =13 sum of first two term 2nd term =a+d =13+10 =23 sum of first two term =13+23 =36 third term =a+2d = 13+ (2×10) =13+20 =33 10th term=a+9d =13+ (9×10) =13+90 =103 nth …
WebMar 22, 2024 · Transcript. Ex 9.2,13 If the sum of n terms of an A.P. is 3n2 + 5n and its mth term is 164, find the value of m. Let a1, a2, … an be the given A.P Given, Sum of n terms = 3n2 + 5n Sn = 3n2 + 5n Putting n = 1 in (1) S1 = 3 × 12 + 5 × 1 = 3 × 1 + 5 × 1 = 3 + 5 = 8 Sum of first 1 terms = First term ∴ First term = a1 = S1 = 8 Sn = 3n2 + 5n …(1) Putting n = 2 in …
WebMar 27, 2024 · Solution For 10] Find the sum of first ' n ' terms of an AP 2 ,8 ,18 ,32 , 11] If α,β and γ are the zeroes of the polynomial P(x)=x3−6x2−x+30 then fin. The world’s only live instant tutoring platform. Become a tutor About us Student login Tutor login. Login. Student Tutor. Filo instant Ask button for chrome browser. ... ip6 and inositol benefitsWebThe sum of the first n terms of an AP is (5n 2 /2 +3n/2). Find its nth term and the 20th term of this AP. arithmetic progression class-10 1 Answer +2 votes answered Sep 14, 2024 by … ip6 and bodybuildingopening to black rain 1990 vhsWebAn arithmetic progression or arithmetic sequence (AP) is a sequence of numbers such that the difference from any succeeding term to its preceding term remains constant throughout the sequence. The constant difference is called common difference of that arithmetic progression. For instance, the sequence 5, 7, 9, 11, 13, 15, . . . is an arithmetic progression … ip 69k chartWebJan 15, 2024 · If the sum of the first n terms of a series is 5n2 + 2n, then its second term is (A) 7 (B) 17 (C) 24 (D) 42 ... If the sum of the first n terms of a series is 5n 2 + 2n, then its second term is (A) 7 (B) 17 (C) 24 ... terms are in AP whose common difference is 2 and the last (2n + 1) asked Jan 18, 2024 in Binomial theorem by Ritik01 (48.4k ... opening to blues clues blues big band dvdWebMar 30, 2024 · Given Sn = 2n2 + 3n Taking n = 1 S1 = 2 12 + 3 1 = 2 + 3 = 5 So, Sum of first term of AP is 5 But sum of first term will be the first term So, First term = a = 5 Taking n = 2 in Sn S1 = 2 22 + 3 2 S2 = 2 4 + 6 S2 = 8 + 6 S2 = 14 Sum of first 2 terms is 14 Finding 2nd term Sum of first 2 terms is 14 First term + Second term = 14 5 + a2 = 14 a2 = … ip6 and inositol nature\\u0027s wayWebThe Sum of the First N Terms of an Ap in ` ( (5n^2)/2 + (3n)/2)`.Find Its Nth Term and the 20th Term Of This Ap. - Mathematics Shaalaa.com. The Sum of the First N Terms of an … opening to blue talks vhs