The nth term of a sequence is n^2 + 20
a) work out the first three terms of the sequence
b) how many terms in the sequence are less than 50?

any help would be appreciated!

21,24,29

5

Step-by-step explanation:

for the first three terms, put n = 1,2,3

for the second part,

n^2 + 20 = 50

from this we knwo n is 5.5

so, the sixth term is larger than 50,since there can't be a 5.5th term

that means there are 5 terms smaller than 50

for this pair of functions g(x)=x-2 and f(x)=|x| is (g o f)(a)= |a| -2

step-by-step explanation:

g(x)=x-2

f(x)=|x|

(g o f)(a)=?

(g o f)(x)=g(f(x))

(g o f)(x)=g(|x|)

(g o f)(x)=|x|-2

(g o f)(a)=|a|-2

step-by-step explanation: