Question

in an arithmetic sequence, the first term is 6 and the fifth term is twice the fourth term. find the common difference

Answer 1

n'th term is given by an = a+(n-1)d

Answer 2

so put., a5= 2a4
a=6

Answer 3

bdw, \(\huge \color{red}{\text{Welcome to Open Study}}\ddot\smile\)

Answer 4

thanks

Answer 5

so could you find common difference ? 'd'
or still need help?

Answer 6

i think i need a bit more help sorry

Answer 7

sure.
the n'th term of Arithmetic sequence is given by
\(\large a_n=a+(n-1)d\)
where a is 1st term = 6
d is common difference(which u need to find)
now its given to u that a5=2a4
u can get a5 as
a+4d =6+4d
a4 as
a+3d = 6+3d
and since
a5=2a4
6+4d=2(6+3d)
now can u find d ?

Answer 8

thanks so much