Answer:
an = a(n-1) - 7
Step-by-step explanation:
the second term is smaller than the first term 7.
a20 = a19 - 7
a19 = a18 - 7
=> a20 = (a18 - 7) - 7
Then you can accumalate until a1
-> a20 = a1 - 19*7 = 86 - 19*7 = -47
10×10^-13
Hope this helps!
A cross section is a surface or shape that is exposed by making a straight cut through something especially at right angles to an axis.
which class are you which class question is this
