Multiple choice. If the sequence is 9, 16, 25, 36, 49 choose the correct expression. A. n^2 B. (3n)^2 C. (n+2)^2

Fist draw a table of the sequence with each number's corresponding n value.1 2 3 4 5 9 16 25 36 49Now draw a table for each option and see if it matches, it is important to remember to carry out the sum within the brackets first .A. n^2 when n= 1, n^2= 1^2 = 1 this is not 9 and therefore cant be AB. (3n)^2when n= 1 , (3n)^2= (3x1)^2 = 9when n= 2 , (3n)^2= (3x2)^2 = 36 which is not 16 and therefore cant be BC. (n+2)^2when n=1, (n+2)^2 = (1+2)^2 = 9when n=2, (n+2)^2 = (2+2)^2 = 16when n=3, (n+2)^2 = (3+2)^2 = 25when n=4, (n+2)^2 = (4+2)^2 = 36when n=5, (n+2)^2 = (5+2)^2 = 49. Therefore the answer must be C.

LC
Answered by Lavana C. Maths tutor

2052 Views

See similar Maths 11 Plus tutors

Related Maths 11 Plus answers

All answers ▸

The cost of one original glazed doughnut is £1.45. a) Find the cost of twelve doughnuts. The doughnut seller is offering customers a special deal: “Twelve doughnuts for £9.45” b) How much will each customer save?


Using long division, clearly showing your method, please calculate 1878 / 3


If 3x =15 and x+y =7 what is (3y)^2?


There are 25 CDs in a box. A shop orders 14 boxes. How many CDs did the shop order?


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