So basically, "Write down in terms of n, an expression for the nth term of the following sequences:
a) 12 10 8 6 4 2
b) 25 20 15 10 5
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Answer:
a ) 2 ( 7-n )
b ) 5 ( 6-n )
Step-by-step explanation:
a ) a+(n-1)d
= 12+ (n-1)-2
= 12-2n+2
= 14-2n
= 2(7-n)
b )a+(n-1)d
=25+ (n-1)-5
= 25-5n+5
= 30-5n
= 5(6-n )
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