Find the 12th term and the sum of the first 9 terms on the following Arithmetic Progression: a = 2 and d = 3

12th term = a + (12 - 1)*d = 2 + 11(3) = 35

Sum (9) = 9/2 [2(2) + (9 - 1)*3] = 9/2 [28] = 252/2 = 126

Answered by Elijah R. Maths tutor

3053 Views

See similar Maths A Level tutors

Related Maths A Level answers

All answers ▸

Integrate ln(x)


a)Given that 10 cosec^2(x) = 16 - 11 cot(x) , find the possible values of tan x .


How can I demonstrate that (sin(T)+cos(T))(1-sin(T)cos(T))=(sin(T))^3+(cos(T))^3


If the functions f and g are defined: f: x--> x/5 + 4 g : x--> 30x + 10. what is x, if fg(x) = x. ?? What would fgf(x) = x^2 be??


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences