HELP PLS Find the formula for the nth term of the sequence below.

20, −10, 5, −2.5, ...

a)an=−12⋅20nA sub n is equal to negative 1 half times 20 to the n th power

b)an=−12⋅20n−1A sub n is equal to negative 1 half times 20 raised to the n minus 1 power

c)an=20⋅(−12)nA sub n is equal to 20 times open paren negative 1 half close paren to the n th power

d)an=20⋅(−12)n−1

step-by-step explanation:

the first 5 right here the next 5 i will upload as separate question

12

step-by-step explanation:

the answer is:

the answer is:

to solve the problem, we need to remember the quotient of power property, it's defined by the following relation:

if we have a quotienf of powers that have the same base, we need to keep the same base and subtract the exponent of the denominator power to the exponent of the numerator power.

so, we are given the expression:

then, calculating we have:

hence, the answer is:

have a nice day!