20 points for both questions Q22.
Here are the first four terms of an arithmetic sequence.
6 10 14 18
a) Find an expression, in terms of n, for the nth term of this sequence.
b) Write down an expression, in terms of n, for the (n+1)th term of this sequence.

Q23.
a) Write 1 390 000 in standard form.
b) Write 0.005 in standard form.
Would appreciate working out for this!