Which term of the sequence –3, 1, 5, 9, 13, … is 65? Alisha solved the question as shown below.

an = 65

a1 = –3

d = –3 – 1 = –4

65 = –3 + (n–1)(–4)

65 = –3 –4n + 4

65 = 1 – 4n

65–1 = 4n

n = 64 ÷ 4

n = 16

So, the 16th term of the sequence is 65.

What is the error in the computation? Find the correct answer.

han when lo ahe whn hew anh ? ?

explanation:

since the airplane is moving with constant speed then the distance travelled can be calculated by x=u*t

in km/h would be:

x=640*3.5=2.240 km

in m/s would be:

u=640 km/h= 640.000 m/h =640.000/ 3600 m/s =177.8 m/s

t= 3.5 h= 3.5 * 3600 s=12.600 s

then x=u*t= 177.8*12.600= 2.240.280 m

.mp4 files, because, video