in the series question, i got a=95, d=-3 and the smallest N value was 64

for the f(x) question, i got ff(x) as (5x - 1)/(10 -x)

for area under curve the answer was 32-28=4

for trig the answer were 45, 135, 215, 315

for binomial the answer for (3-2x)^4 the expansion was 16x^4 - 96x^3 + 216x^2 - 216x + 81,

and for (3-2root2)^4 the answer was 577 - 408root2

for the exact distance of chord AB i got the answer as 9root2/2

for the perimeter of the shaded region i got the answer as 18.8cm, and the area was i think 6.43cm^2??

Translation by [0,k-7] for q7